South Sudan has announced its first case of Covid-19, making it the 51st of Africa's 54 countries to have the disease, AP reports.

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

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

The only vaccine is social distancing, said Machar.