GENEVA (Reuters) – Coronavirus outbreak is “getting bigger”, the World Helath Organization (WHO) said on Friday after Nigeria confirmed sub-Saharan Africa’s first case, reiterating its warning that the virus could reach most “if not all countries”.

WHO spokesman Christian Lindmeier told a Geneva news briefing that it was looking into reports of some people getting re-infected, which would include reviewing how were tests taken, adding: “But in general a person who had coronavirus infection would be immune at least for a while.”

A WHO mission to Iran – which has now reported 388 cases and 34 deaths – is supposed to start early next week, and is still being put together, he said.

Reporting by Stephanie Nebehay; Editing by Alison Williams