హార్డ్ ఇమ్మ్యూనిటి పై తాజా పరిశోధన ఏం చెపుతోంది?||When India gets herd immunity?||
Herd immunity , which happens when so many people in a community become immune to the disease that it stops spreading, could be achieved with fewer people being infected than previously estimated, according to a new study.
Scientists, including those from the University of Nottingham in the UK, noted that herd immunity develops when individuals contracting the disease build up natural immunity, and by people receiving a vaccine. They explained that when a large percentage of the population becomes immune to a disease, the spread of the disease slows down or stops and the chain of transmission is broken.
In the current study, published in the journal Science, the researchers devised a mathematical model categorising people into groups reflecting age and social activity level to determine the threshold of the population that needed to be immune for herd immunity to develop. When they factored in differences in age and social activity in the model, they found that the herd immunity level reduced from 60 to 43 per cent. The 43 per cent figure, according to the scientists, should be interpreted as an illustration rather than an exact value, or even a best estimate. For Covid-19, they said herd immunity is often stated as around 60 per cent, a figure derived from the fraction of the population that must be vaccinated in advance of an epidemic to prevent a large outbreak.
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హార్డ్ ఇమ్మ్యూనిటి పై తాజా పరిశోధన ఏం చెపుతోంది?||When India gets herd immunity?|| Herd immunity , which happens when so many people in a community become immune to the disease that it stops spreading, could be achieved with fewer people being infected than previously estimated, according to a new study. Scientists, including those from the University of Nottingham in the UK, noted that herd immunity develops when individuals contracting the disease build up natural immunity, and by people receiving a vaccine. They explained that when a large percentage of the population becomes immune to a disease, the spread of the disease slows down or stops and the chain of transmission is broken. In the current study, published in the journal Science, the researchers devised a mathematical model categorising people into groups reflecting age and social activity level to determine the threshold of the population that needed to be immune for herd immunity to develop. When they factored in differences in age and social activity in the model, they found that the herd immunity level reduced from 60 to 43 per cent. The 43 per cent figure, according to the scientists, should be interpreted as an illustration rather than an exact value, or even a best estimate. For Covid-19, they said herd immunity is often stated as around 60 per cent, a figure derived from the fraction of the population that must be vaccinated in advance of an epidemic to prevent a large outbreak.