South Africa begins second COVID-19 vaccine trial byAgency Report August 17, 2020 The trial will enroll up to 2,904 volunteers aged 18-64 years.
![A family is being tested for COVID-19 in Nigeria [PHOTO: TW: @NCDCgov]](https://i0.wp.com/media.premiumtimesng.com/wp-content/files/2020/08/EevF4PWXsAEjcyo.jpg?fit=2048%2C1365&ssl=1)
