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The Lancet: herd immunity and vaccines to prevent infection

 Last Update: 2021-05-07
 Source: Internet
 Author: User

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Vaccines have two main mechanisms of action of two vaccines.

It can completely prevent the occurrence of infection , or stop the development of symptoms after the infection occurs.

Lancet

Hall and colleagues report that 21 days after a single injection, BNT162b2 is 70% effective (95% CI 55-85) against asymptomatic or symptomatic infections, and 7 days after two SIREN injections, the effectiveness is 85% (74-96).

prevention

These results will help public health experts and decision makers improve the goal of achieving herd immunity through vaccination, which is necessary to prevent widespread transmission.

One-dose treatment strategy may be the best way to avoid most deaths, but to improve the population’s immunity to suppress transmission, a full course of two-dose treatment is required.

Vaccinators are less likely to develop symptoms after infection.

In addition to directly protecting the vaccinated individuals, the COVID-19 vaccine also provides a safe way to control community transmission.

Eyal Leshem, Benjamin Alan Lopman, Population immunity and vaccine protection against infection.

Eyal Leshem, Benjamin Alan Lopman, Population immunity and vaccine protection against infection.
The Lancet.
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