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  1. ... the death rate among covid patients.  Infections from ventilators...that they weaken the respiratory system in general caused many...be closer to herd immunity than we are now...

    12 Answers · Politics & Government · 26/06/2020

  2. ...be false.. second.. COVID -19 vaccines (yes...activate both humeral and cellular immunity (both T-cells... low soon after the infection , the Memory B... remain in our system for decades and for...

    9 Answers · Health · 28/08/2020

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