Coronavirus infections are spiking in Japan and creating hot spots in India's congested cities just as the U.S. and some of the hardest-hit European countries are considering when to start easing restrictions that have helped curb their outbreaks of the disease.

Japan reported more than 500 new cases for the first time Thursday, a worrisome rise since it has the world's oldest population and COVID-19 can be especially serious in the elderly. Prime Minister Shinzo Abe declared a state of emergency, but not a lockdown, in Tokyo and six other prefectures earlier this week. Companies in the world's third-largest economy have been slow to embrace working from home, and many commuters were on Tokyo's streets as usual.

More Images
Policemen detain a man for violating the curfew declared by the government amid coronavirus concerns in El Callao, on the outskirts of Lima, Peru, Wednesday, April 8, 2020. (AP PhotoRodrigo Abd)

Coronavirus infections are spiking in Japan and creating hot spots in India's congested cities just as the U.S. and some of the hardest-hit European countries are considering when to start easing restrictions that have helped curb their outbreaks of the disease.

Commuters wear face masks to protect against the spread of new coronavirus as they walk through a subway station in Beijing, Thursday, April 9, 2020. China's National Health Commission on Thursday reported dozens of new COVID-19 cases, including most of which it says are imported infections in recent arrivals from abroad and two "native" cases in the southern province of Guangdong.  (AP PhotoMark Schiefelbein)

Meanwhile, deaths, hospitalizations and new infections have been leveling off in places like Italy and Spain, which together have more than 30,000 deaths. Even New York has seen encouraging signs amid the gloom. At the same time, politicians and health officials warn that the crisis is far from over and a catastrophic second wave could hit if countries let down their guard too soon.

A woman argues with a policeman during an operation to enforce the curfew declared by the government due to the new coronavirus pandemic, in El Callao, on the outskirts of Lima, Peru, Wednesday, April 8, 2020. (AP PhotoRodrigo Abd)

The U.S. has by far the most confirmed cases, with over 430,000 people infected. New York state on Wednesday recorded its highest one-day increase in deaths, 779, for an overall death toll of almost 6,300, more than 40% of the U.S. total of around 15,000.

A man wears a protective mask while waiting for a bus in Detroit, Wednesday, April 8, 2020. Detroit buses will have surgical masks available to riders starting Wednesday, a new precaution the city is taking from the new coronavirus COVID-19. (AP PhotoPaul Sancya)

In Britain, Prime Minister Boris Johnson was improving and sitting up in bed, authorities said, after he had spent a second night in intensive care due to COVID-19 symptoms.

Cristo Rey brotherhood members hang banners with the images of Jesus Christ and Virgin Mary at the Candelaria church in Guatemala City, Wednesday, April 8, 2020. Catholics prepare to celebrate Holy Week amid measures to prevent the spread of the coronavirus, including stopping all religious activities across the country. (AP PhotoMoises Castillo)

Vice President Mike Pence warned that Philadelphia was emerging as a potential hot spot. Washington, D.C., Louisiana, Chicago, Detroit and Colorado were also seeing worsening outbreaks.

Teacher Chung Ha-eun gives an online class amid the new coronavirus outbreak at Seoul girls' high school in Seoul, Thursday, April 9, 2020. Senior high school students begin school semester with online classes.  Schools remain closed as part of measures taken by the government to stop the spread of the coronavirus. (AP PhotoAhn Young-joon)

Proposals being floated include immunity certificates, which would require antibody blood tests, and allowing younger workers to return first, as they are less vulnerable to the virus.

A family rides their tractor through the countryside wearing masks as a precaution against the spread of the new coronavirus in Havana, Cuba, Wednesday, April 8, 2020. Cuban authorities are requiring the use of masks for anyone outside their homes. (AP PhotoRamon Espinosa)

Earlier this week, Austria and the Czech Republic jumped out ahead of other European countries and announced plans to relax some restrictions.

Employees of Vi at La Jolla retirement complex recite the Pledge of Alligence as they hold signs and wave flags for the residents during an afternoon pep rally, Wednesday, April 8, 2020, in San Diego. As elderly residents who have been quarantined for weeks make their way out onto their balconies, employees below dance, wave flags and shout words of encouragement in a now almost daily afternoon pep rally. (AP PhotoGregory Bull)

For most, the virus causes mild to moderate symptoms such as fever and cough. But for some older adults and the infirm, it can cause pneumonia and death. Almost 330,000 people have recovered.

Two men check their phones as they sit near the harbor in Stockholm, Sweden, Wednesday, April 8, 2020. Swedish authorities have advised the public to practice social distancing because of the coronavirus pandemic, but still allow a large amount of personal freedom, unlike most other European countries. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death.(AP PhotoAndres Kudacki)

Two men check their phones as they sit near the harbor in Stockholm, Sweden, Wednesday, April 8, 2020. Swedish authorities have advised the public to practice social distancing because of the coronavirus pandemic, but still allow a large amount of personal freedom, unlike most other European countries. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death.(AP PhotoAndres Kudacki)

An employee controls access to a Coppel department store, where shoppers were being asked to wait in line to enter a few at a time, and to use hand gel and maintain social distancing, in Mexico City, Wednesday, April 8, 2020. Mexico's government announced Wednesday that over the last few weeks, more than 346,000 jobs had been lost in the country's formal sector, as the COVID-19 pandemic has curtailed business activity.(AP PhotoRebecca Blackwell)

An employee controls access to a Coppel department store, where shoppers were being asked to wait in line to enter a few at a time, and to use hand gel and maintain social distancing, in Mexico City, Wednesday, April 8, 2020. Mexico's government announced Wednesday that over the last few weeks, more than 346,000 jobs had been lost in the country's formal sector, as the COVID-19 pandemic has curtailed business activity.(AP PhotoRebecca Blackwell)

People with protective masks cross a pedestrian walkway Thursday, April 9, 2020, in Tokyo. Japanese Prime Minister Shinzo Abe declared a state of emergency last Tuesday for Tokyo and six other prefectures to ramp up defenses against the spread of the coronavirus. (AP PhotoEugene Hoshiko)

People with protective masks cross a pedestrian walkway Thursday, April 9, 2020, in Tokyo. Japanese Prime Minister Shinzo Abe declared a state of emergency last Tuesday for Tokyo and six other prefectures to ramp up defenses against the spread of the coronavirus. (AP PhotoEugene Hoshiko)

A man with protective mask walks on an underpass Thursday, April 9, 2020, in Tokyo. Japanese Prime Minister Shinzo Abe declared a state of emergency last Tuesday for Tokyo and six other prefectures to ramp up defenses against the spread of the coronavirus. (AP PhotoEugene Hoshiko)

A man with protective mask walks on an underpass Thursday, April 9, 2020, in Tokyo. Japanese Prime Minister Shinzo Abe declared a state of emergency last Tuesday for Tokyo and six other prefectures to ramp up defenses against the spread of the coronavirus. (AP PhotoEugene Hoshiko)

A man wearing a face mask walks at the Gwanghwamun Square in downtown Seoul, South Korea, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP PhotoLee Jin-man)

A man wearing a face mask walks at the Gwanghwamun Square in downtown Seoul, South Korea, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP PhotoLee Jin-man)

India, whose 1.3 billion people are under a lockdown until next week, has sealed dozens of hot spots in and around the capital, and will supply residents with food and medicine while not allowing them to leave. The number of confirmed cases exceeds 5,000, with 166 deaths, according to India’s Health Ministry.

Policemen detain a man for violating the curfew declared by the government amid coronavirus concerns in El Callao, on the outskirts of Lima, Peru, Wednesday, April 8, 2020. (AP PhotoRodrigo Abd)

Policemen detain a man for violating the curfew declared by the government amid coronavirus concerns in El Callao, on the outskirts of Lima, Peru, Wednesday, April 8, 2020. (AP PhotoRodrigo Abd)

Meanwhile, deaths, hospitalizations and new infections have been leveling off in places like Italy and Spain, which together have more than 30,000 deaths. Even New York has seen encouraging signs amid the gloom. At the same time, politicians and health officials warn that the crisis is far from over and a catastrophic second wave could hit if countries let down their guard too soon.

“We are flattening the curve because we are rigorous about social distancing,” New York state Gov. Andrew Cuomo said. “But it’s not a time to be complacent. It’s not a time to do anything different than we’ve been doing.”

The number of confirmed cases of COVID-19 has climbed to about 1.5 million worldwide, with nearly 90,000 deaths, according to figures compiled by Johns Hopkins University. The true numbers are almost certainly much higher, because of limited testing, different rules for counting the dead and concealment by some governments.

Commuters wear face masks to protect against the spread of new coronavirus as they walk through a subway station in Beijing, Thursday, April 9, 2020. China's National Health Commission on Thursday reported dozens of new COVID-19 cases, including most of which it says are imported infections in recent arrivals from abroad and two "native" cases in the southern province of Guangdong.  (AP PhotoMark Schiefelbein)

Commuters wear face masks to protect against the spread of new coronavirus as they walk through a subway station in Beijing, Thursday, April 9, 2020. China's National Health Commission on Thursday reported dozens of new COVID-19 cases, including most of which it says are imported infections in recent arrivals from abroad and two "native" cases in the southern province of Guangdong. (AP PhotoMark Schiefelbein)

The U.S. has by far the most confirmed cases, with over 430,000 people infected. New York state on Wednesday recorded its highest one-day increase in deaths, 779, for an overall death toll of almost 6,300, more than 40% of the U.S. total of around 15,000.

“The bad news is actually terrible,” Cuomo said. Still, the governor said hospitalizations are decreasing and many of those now dying fell ill in the outbreak’s earlier stages.

In a sign of how much the virus has affected air travel, the number of Americans getting on airplanes sank to a level not seen since the 1950s, the dawn of the jet age. The Transportation Security Administration screened fewer than 100,000 people on Tuesday, a drop of 95% from a year ago.

A woman argues with a policeman during an operation to enforce the curfew declared by the government due to the new coronavirus pandemic, in El Callao, on the outskirts of Lima, Peru, Wednesday, April 8, 2020. (AP PhotoRodrigo Abd)

A woman argues with a policeman during an operation to enforce the curfew declared by the government due to the new coronavirus pandemic, in El Callao, on the outskirts of Lima, Peru, Wednesday, April 8, 2020. (AP PhotoRodrigo Abd)

In Britain, Prime Minister Boris Johnson was improving and sitting up in bed, authorities said, after he had spent a second night in intensive care due to COVID-19 symptoms.

Dr. Anthony Fauci, the United States’ top infectious-diseases expert, said the Trump administration has been working on plans to eventually reopen the country amid evidence that social distancing is working to stop the virus’s spread.

But he said it’s not time to scale back such measures: “Keep your foot on the accelerator because this is what is going to get us through this,” he said at Wednesday’s White House briefing.

A man wears a protective mask while waiting for a bus in Detroit, Wednesday, April 8, 2020. Detroit buses will have surgical masks available to riders starting Wednesday, a new precaution the city is taking from the new coronavirus COVID-19. (AP PhotoPaul Sancya)

A man wears a protective mask while waiting for a bus in Detroit, Wednesday, April 8, 2020. Detroit buses will have surgical masks available to riders starting Wednesday, a new precaution the city is taking from the new coronavirus COVID-19. (AP PhotoPaul Sancya)

Vice President Mike Pence warned that Philadelphia was emerging as a potential hot spot. Washington, D.C., Louisiana, Chicago, Detroit and Colorado were also seeing worsening outbreaks.

Pence said he would speak to leaders in African American communities who are concerned about disproportionate impacts from the virus. Fauci acknowledged that historic disparities in health care have put African Americans at risk for diseases that make them more vulnerable in the outbreak.

Italian Premier Giuseppe Conte is expected to announce in the coming days how long the country’s lockdown will remain in place amid expectations that some restrictions could be eased. Discussions are focused first on opening more of the country’s industries.

Cristo Rey brotherhood members hang banners with the images of Jesus Christ and Virgin Mary at the Candelaria church in Guatemala City, Wednesday, April 8, 2020. Catholics prepare to celebrate Holy Week amid measures to prevent the spread of the coronavirus, including stopping all religious activities across the country. (AP PhotoMoises Castillo)

Cristo Rey brotherhood members hang banners with the images of Jesus Christ and Virgin Mary at the Candelaria church in Guatemala City, Wednesday, April 8, 2020. Catholics prepare to celebrate Holy Week amid measures to prevent the spread of the coronavirus, including stopping all religious activities across the country. (AP PhotoMoises Castillo)

Proposals being floated include immunity certificates, which would require antibody blood tests, and allowing younger workers to return first, as they are less vulnerable to the virus.

In Spain, which has tallied more than 14,000 dead, Budget Minister María Jesús Montero said Spaniards will progressively regain their “normal life” from April 26 onward but warned that the deescalation of the lockdown will be “very orderly to avoid a return to the contagion.”

Without giving specifics, French authorities have likewise begun to speak openly of planning the end of the country’s confinement period, which is set to expire April 15 but will be extended, according to the president’s office. The virus has claimed more than 10,000 lives in France.

Teacher Chung Ha-eun gives an online class amid the new coronavirus outbreak at Seoul girls' high school in Seoul, Thursday, April 9, 2020. Senior high school students begin school semester with online classes.  Schools remain closed as part of measures taken by the government to stop the spread of the coronavirus. (AP PhotoAhn Young-joon)

Teacher Chung Ha-eun gives an online class amid the new coronavirus outbreak at Seoul girls' high school in Seoul, Thursday, April 9, 2020. Senior high school students begin school semester with online classes. Schools remain closed as part of measures taken by the government to stop the spread of the coronavirus. (AP PhotoAhn Young-joon)

Earlier this week, Austria and the Czech Republic jumped out ahead of other European countries and announced plans to relax some restrictions.

British government officials, beset with a rising death toll of more than 7,000, said there is little chance the nationwide lockdown there will be eased when its current period ends next week.

The desire to get back to normal is driven in part by the damage to world economies. France has entered a recession and Germany, Europe’s economic powerhouse, is also facing a deep recession. Japan could contract by a record 25% this quarter, the highest since gross domestic product began to be tracked in 1955.

A family rides their tractor through the countryside wearing masks as a precaution against the spread of the new coronavirus in Havana, Cuba, Wednesday, April 8, 2020. Cuban authorities are requiring the use of masks for anyone outside their homes. (AP PhotoRamon Espinosa)

A family rides their tractor through the countryside wearing masks as a precaution against the spread of the new coronavirus in Havana, Cuba, Wednesday, April 8, 2020. Cuban authorities are requiring the use of masks for anyone outside their homes. (AP PhotoRamon Espinosa)

For most, the virus causes mild to moderate symptoms such as fever and cough. But for some older adults and the infirm, it can cause pneumonia and death. Almost 330,000 people have recovered.

Follow AP news coverage of the coronavirus pandemic at http://apnews.com/VirusOutbreak and https://apnews.com/UnderstandingtheOutbreak

Employees of Vi at La Jolla retirement complex recite the Pledge of Alligence as they hold signs and wave flags for the residents during an afternoon pep rally, Wednesday, April 8, 2020, in San Diego. As elderly residents who have been quarantined for weeks make their way out onto their balconies, employees below dance, wave flags and shout words of encouragement in a now almost daily afternoon pep rally. (AP PhotoGregory Bull)

Employees of Vi at La Jolla retirement complex recite the Pledge of Alligence as they hold signs and wave flags for the residents during an afternoon pep rally, Wednesday, April 8, 2020, in San Diego. As elderly residents who have been quarantined for weeks make their way out onto their balconies, employees below dance, wave flags and shout words of encouragement in a now almost daily afternoon pep rally. (AP PhotoGregory Bull)

Two men check their phones as they sit near the harbor in Stockholm, Sweden, Wednesday, April 8, 2020. Swedish authorities have advised the public to practice social distancing because of the coronavirus pandemic, but still allow a large amount of personal freedom, unlike most other European countries. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death.(AP PhotoAndres Kudacki)

Two men check their phones as they sit near the harbor in Stockholm, Sweden, Wednesday, April 8, 2020. Swedish authorities have advised the public to practice social distancing because of the coronavirus pandemic, but still allow a large amount of personal freedom, unlike most other European countries. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death.(AP PhotoAndres Kudacki)

An employee controls access to a Coppel department store, where shoppers were being asked to wait in line to enter a few at a time, and to use hand gel and maintain social distancing, in Mexico City, Wednesday, April 8, 2020. Mexico's government announced Wednesday that over the last few weeks, more than 346,000 jobs had been lost in the country's formal sector, as the COVID-19 pandemic has curtailed business activity.(AP PhotoRebecca Blackwell)

An employee controls access to a Coppel department store, where shoppers were being asked to wait in line to enter a few at a time, and to use hand gel and maintain social distancing, in Mexico City, Wednesday, April 8, 2020. Mexico's government announced Wednesday that over the last few weeks, more than 346,000 jobs had been lost in the country's formal sector, as the COVID-19 pandemic has curtailed business activity.(AP PhotoRebecca Blackwell)

People with protective masks cross a pedestrian walkway Thursday, April 9, 2020, in Tokyo. Japanese Prime Minister Shinzo Abe declared a state of emergency last Tuesday for Tokyo and six other prefectures to ramp up defenses against the spread of the coronavirus. (AP PhotoEugene Hoshiko)

People with protective masks cross a pedestrian walkway Thursday, April 9, 2020, in Tokyo. Japanese Prime Minister Shinzo Abe declared a state of emergency last Tuesday for Tokyo and six other prefectures to ramp up defenses against the spread of the coronavirus. (AP PhotoEugene Hoshiko)

A man with protective mask walks on an underpass Thursday, April 9, 2020, in Tokyo. Japanese Prime Minister Shinzo Abe declared a state of emergency last Tuesday for Tokyo and six other prefectures to ramp up defenses against the spread of the coronavirus. (AP PhotoEugene Hoshiko)

A man with protective mask walks on an underpass Thursday, April 9, 2020, in Tokyo. Japanese Prime Minister Shinzo Abe declared a state of emergency last Tuesday for Tokyo and six other prefectures to ramp up defenses against the spread of the coronavirus. (AP PhotoEugene Hoshiko)

A man wearing a face mask walks at the Gwanghwamun Square in downtown Seoul, South Korea, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP PhotoLee Jin-man)

A man wearing a face mask walks at the Gwanghwamun Square in downtown Seoul, South Korea, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP PhotoLee Jin-man)