Results showed that germination percentage of urediospore, uredium number and sporulation of challenge inoculation race were reduced after inoculation with weak virulent race.
For example, they're looking into whether less virulent relatives of coronavirus could protect against COVID-19 the way vaccinia protects against smallpox.
Oh, other than waiting out the exponential growth period of the virulent organisms trooping through my microvilli into my circulatory system-hunky-dory.