Covid-19: What is herd immunity and how does it lower infection?

  1. home
  2. > Hindustan Times
  3. > Covid-19: What is herd immunity and how does it lower infection?
replay trump newslist
up NEXT IN 5 SECONDS sports newslist
tap to unmute
00:00/00:00
NaN/0

Covid-19: What is herd immunity and how does it lower infection?

Apr 24, 2020 10:59 IST

Coronavirus disease is a new virus that has never infected humans before. Humans have no immunity against it, so the virus spreads quickly. Herd immunity occurs when at least 70%-90% of a population have been infected and developed natural immunity against a disease, or have been vaccinated against it. Mass vaccination has eradicated smallpox from the world, and polio from several countries, including India. We are very far from herd immunity, according to World Health Organization. To contain coronavirus disease, at least 80% people must have antibodies for herd protection to kick in. Watch the full video for more details.