Officials in South Sudan say the country has its first case of COVID-19, making it the 51st of Africa's 54 countries to have the disease.

First Vice President Riek Machar and the U.N. mission in South Sudan confirmed the case of a U.N. worker who arrived in the country from Netherlands on Feb. 28. The patient, a 29-year-old woman, first showed signs of the disease on April 2 and is recovering, said officials.

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The congregation practices social distancing to curb the spread of the new coronavirus, with chairs arranged a distance apart, as they sit outside and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

Officials in South Sudan say the country has its first case of COVID-19, making it the 51st of Africa's 54 countries to have the disease.

The congregation practices social distancing to curb the spread of the new coronavirus, with chairs arranged a distance apart, as they sit outside and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

“The only vaccine is social distancing,” said Machar.

The congregation practises social distancing to curb the spread of the new coronavirus, as they sit a distance apart on pews and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

To prevent the spread of the virus in South Sudan, President Salva Kiir last week imposed a curfew from 8:00 p.m. to 6:00 a.m. for six weeks and closed borders, airports, schools, churches and mosques.

The congregation practices social distancing to curb the spread of the new coronavirus, with chairs arranged a distance apart, as they sit outside and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

Ethiopia’s Prime Minister Abiy Ahmed held discussions Sunday with opposition party leaders on measures to combat the virus. A number of Ethiopia's regional states have implemented bans on movement of people and vehicles, but not yet in the capital Addis Ababa.

The congregation practices social distancing to curb the spread of the new coronavirus, as they sit a distance apart on pews and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

The congregation practices social distancing to curb the spread of the new coronavirus, as they sit a distance apart on pews and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

A priest wears a mask to limit the risk of infection by the new coronavirus, as he attends a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

A priest wears a mask to limit the risk of infection by the new coronavirus, as he attends a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

South Sudan, with 11 million people, currently has four ventilators and wants to increase that number, said Machar, who emphasized that people should stay three to six feet apart from others.

The congregation practices social distancing to curb the spread of the new coronavirus, with chairs arranged a distance apart, as they sit outside and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

The congregation practices social distancing to curb the spread of the new coronavirus, with chairs arranged a distance apart, as they sit outside and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

“The only vaccine is social distancing,” said Machar.

The patient is under quarantine at U.N. premises and health workers are tracing the people who had been in contact with her, said David Shearer, head of the U.N. operations in South Sudan.

He said he hoped the measures would contain the case.

The congregation practices social distancing to curb the spread of the new coronavirus, with chairs arranged a distance apart, as they sit outside and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

The congregation practices social distancing to curb the spread of the new coronavirus, with chairs arranged a distance apart, as they sit outside and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

To prevent the spread of the virus in South Sudan, President Salva Kiir last week imposed a curfew from 8:00 p.m. to 6:00 a.m. for six weeks and closed borders, airports, schools, churches and mosques.

With the disease in South Sudan, now just three countries in Africa have not reported any cases of COVID-19: the tiny mountain kingdom of Lesotho in southern Africa, and the island nations of Comoros and Sao Tome and Principe.

Ethiopia on Sunday reported its first death from the virus and announced five more cases bringing its total to 43, most of them imported by travelers.

The congregation practises social distancing to curb the spread of the new coronavirus, as they sit a distance apart on pews and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

The congregation practises social distancing to curb the spread of the new coronavirus, as they sit a distance apart on pews and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

Ethiopia’s Prime Minister Abiy Ahmed held discussions Sunday with opposition party leaders on measures to combat the virus. A number of Ethiopia's regional states have implemented bans on movement of people and vehicles, but not yet in the capital Addis Ababa.

AP journalist Elias Meseret in Addis Ababa, Ethiopia, contributed to this story.

The congregation practices social distancing to curb the spread of the new coronavirus, with chairs arranged a distance apart, as they sit outside and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

The congregation practices social distancing to curb the spread of the new coronavirus, with chairs arranged a distance apart, as they sit outside and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

The congregation practices social distancing to curb the spread of the new coronavirus, as they sit a distance apart on pews and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

The congregation practices social distancing to curb the spread of the new coronavirus, as they sit a distance apart on pews and listen to a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

A priest wears a mask to limit the risk of infection by the new coronavirus, as he attends a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)

A priest wears a mask to limit the risk of infection by the new coronavirus, as he attends a Sunday morning mass at the Bole Medhane Alem Ethiopian Orthodox Cathedral in Addis Ababa, Ethiopia Sunday, April 5, 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 PhotoMulugeta Ayene)