NAIROBI, Kenya (AP) - Another new variant of the coronavirus appears to have emerged in Nigeria, Africa’s top public health official said Thursday, but he added that further investigation was needed.

On Friday, the World Health Organization categorized a new strain of COVID-19 that was recently detected in southern Africa as a "variant of concern." The WHO's Advisory Group on SARS-CoV-2 Virus ...

There was no immediate indication whether the variant causes more severe disease. As with other variants, some infected people display no symptoms, South African experts said. The WHO panel drew from ...