Feature Stories

26 February 2021 | Coronavirus (COVID-19)

What is COVID-19 vaccine efficacy?

In an incredible scientific feat, COVID-19 vaccines have been developed within less than a year after the virus was first detected. Several vaccines that have become available have shown different levels of efficacy. So what is vaccine efficacy? Dr Lee Hampton, a paediatrician and medical epidemiologist with GAVI, the Vaccine Alliance, explains.

Read more