Researchers from Canada followed 15 recovered coronavirus patients who donated convalescent plasma
Convalescent plasma therapy is when the liquid portion of blood is taken from a recovered COVID-19 patients
It is transferred into sick patients in hopes they will develop the antibodies needed to fight off the infection
All of the donors showed decreases in antibodies after three months, and levels for half the detectable antibodies fell again 21 days later
This means the earlier that recovered COVID-19 patients donate plasma to those who are ill, the better


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aslo means vaccines wont work after 3 months