4 types of vaccines against COVID – newdiscoover
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4 types of vaccines against COVID


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There are four types of vaccines to prevent COVID-19, reports the World Health Organization (WHO).

At the end of November, there were 237 vaccine projects against the disease worldwide, according to a census by the Milken Institute, a U.S.-based think tank, reported Le Monde.

Vaccines aim to teach the immune system to recognize and manufacture its defenses, the antibodies (produced by B-cells), specifically against the Sars CoV-2 virus. Le Monde’s explanations focus on this mechanism, even though there is, in parallel, another type of immune defense, that of T-cells, which can be activated by vaccines.


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