Around 200 research teams are working day and night on an effective COVID-19 vaccine.
Not yet in human trials
Small-scale human trials
Combination of phases 1 and 2
Middle-scale human trials
Large-scale human trials
Authorization for general use
Source: WHO. Last updated 19 October 2020
Research teams around the globe are working day and night to develop an effective vaccine for COVID-19. However, vaccines generally take years of testing and research before being approved for general use. That's why researchers may pause their trials at any stage if they observe worrying symptoms in animals and human volunteers.
A vaccine can be either a weakened virus or parts of it. It prevents us from being infected with the actual virus by training our immune system to recognize and combat it. Please consult the World Health Organization (WHO)'s website for detailed information on individual vaccines in development.