One thought on “What do we still need to know?

  1. Arti says:

    All the vaccines except the one from Johnson & Johnson require two shots to train the immune system well enough to fight the coronavirus. Periodic booster shots to exseem immunity and/or protect against new variants of the virus might be needed. While the small number of early trial participants have maintained levels of protective antibodies for nearly a year, companies will continue to follow volunteers for two years to see if their immunity begins to wane. It remains unclear how long any of these vaccines will continue to protect people. S. During each part of the process, the vaccine boxes must be kept at exactly the right temperature.  Moderna vaccine can last in the refrigerator for a month and the J&J vaccine can be stored in the refrigerator for at least 3 months. &

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