Herd immunity is also known as community immunity or herd or group protection against some communicable infections. Some experts have suggested that this might be a good way to prevent the spread of coronavirus or COVID-19. Herd immunity is a condition acquired when most of a population becomes immune to an infectious disease, thus preventing the spread of the disease. Depending on how contagious the disease is, about 70% to 90% of a population needs immunity to attain herd immunity.
This can be achieved in two ways:
Vaccination of many people for the disease to achieve immunityMany people contract the disease and after a period of time build an immune response to it. This is known as natural immunity.
Sinovac’s development of a vaccine against COVID-19 began in January 2020 in partnership with leading academic research institutes in China
Its timeline for clinical trials is behind the likes of Moderna Inc, the University of Oxford in collaboration with AstraZeneca Plc, and an alliance of BioNTech and Pfizer Inc, whose projects all grabbed headlines by moving to human trials as early as March.
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