FILEIn this Wednesday, July 28, 2021 file photo, a health worker administers a dose of Janssen COVID-19 vaccine by Johnson & Johnson in the Medina neighborhood in Dakar, Senegal. Thousands of new coronavirus cases have been reported in West Africa in recent weeks amid low vaccination rates and the spread of the delta variant. Officials say cases have risen sharply in Senegal, Ghana, Nigeria and elsewhere. (AP Photo/Leo Correa, File)
Foto: Leo Correa
