Think about the diphtheria vaccine. how can people infected withCOVID-19 generate free antibodies in their plasma when they arerecovered. How and why is the plasma from recovered patients usedas a one of the potential treatments for Infected covid-19patients? Knowing this, think about how to make a vaccine againstcovid-19. Possibly substitute the virus for diphtheria? why do weneed booster doses of the diphtheria vaccines?
