What is Herd Immunity?

  • Herd immunity is the indirect protection from a contagious infectious disease that happens when a population is immune either through vaccination or immunity developed through the previous infection.
  • Herd immunity has been thought of as a possible solution to the coronavirus but with no vaccine and not enough as well as data available on how long will the immunity last, makes the herd immunity as risk no one would...
  • ... like to take.
  • Without distancing and other measures, people would get infected in a matter of a few months but this would also mean the hospitals will be overwhelmed and the death rate would rise.
  • This means that even people who aren’t vaccinated, or in whom the vaccine doesn’t trigger immunity, are protected because people around them who are immune can act as buffers between them and an infected person.
  • If 80% of a population is immune to a virus, four out of every five people who encounter someone with the disease won’t get sick. In this way, the spread of infectious diseases is kept under control.
  • Herd immunity means no spread of the disease further but there should be a vaccine available to reduce the risks.Depending on how contagious infection is, usually, 70% to 90% of a population needs immunity..
  • .... to achieve herd immunity.

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