Nigeria has confirmed a third case of coronavirus, a 30-year-old Nigerian woman who flew into the commercial city of Lagos from the UK on 13 March.

Lagos State's Ministry of Health tweeted that she was in self-isolation when she developed symptoms.

She is receiving care at Mainland General Hospital.

Breaking!
Third case of #COVID19NIGERIA confirmed in Lagos.
- This is a new case independent of the index case
- 30 year old Nigerian, female
- Returned from the UK on 13th March
- Observed self-Isolation, developed symptoms
- Tested positive
- Now at Mainland GH receiving care pic.twitter.com/f8osZk4Ba4

— LSMOH (@LSMOH) March 17, 2020

Nigeria reported sub-Saharan Africa's first case of the coronavirus in February.

On Monday, the government said it would keep its borders open, even to tourists from high risk countries, the Punch newspaper reports.

Health Minister Olorunnibe Mamora is quoted as saying that visitors from France, Germany, Spain, China, Japan, Iran, Italy and South Korea would be screened.