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However, demonstrating that a COVID-19 vaccine is safe and effective can only be a game changer if uptake is high enough to stop the virus's spread. According to models with an 80 percent vaccine efficacy, the percentage of the population that needs to be vaccinated to achieve herd immunity (depending on factors such as the basic reproduction number, the duration of vaccine-induced immunity, and whether vaccines prevent transmission....
However, demonstrating that a COVID-19 vaccine is safe and effective can only be a game changer if uptake is high enough to stop the virus's spread. According to models with an 80 percent vaccine efficacy, the percentage of the population that needs to be vaccinated to achieve herd immunity (depending on factors such as the basic reproduction number, the duration of vaccine-induced immunity, and whether vaccines prevent transmission.
The number of persons testing positive for this new variant is alarming and it has triggered reactions from all over the world, with countries imposing travel bans, restricting movements and enacting strict quarantine laws. Precautionary steps are required during the early stages of the variant to guard against potential harm and to limit transmission....
The number of persons testing positive for this new variant is alarming and it has triggered reactions from all over the world, with countries imposing travel bans, restricting movements and enacting strict quarantine laws. Precautionary steps are required during the early stages of the variant to guard against potential harm and to limit transmission.
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