South Africa rolls out second coronavirus vaccine trial

Shares South Africa will launch clinical trials of a US-developed coronavirus vaccine with 2,900 volunteers this week, the second such study in the African country worst hit by the disease, lead investigator Shabir Madhi said Tuesday. Known as NVX-CoV2373, the vaccine was developed by US biotech company Novavax from the genetic sequence of SARS‑CoV‑2, the...