alt Hacker News> the pigs appear entirely immune to more than 99% of the known versions of the PRRS virus, although there is one rare subtype that may break through the protection.
Doesn't this just set the table for that rare subtype to become dominant?
Replies
nothercastle • yesterday at 6:58 PM
Yes
Evading immunity doesn’t always mean you become dominant. It might not be as transmissible, worse at replicating, or not as compatible with the host. Basically, there may be reasons why it was the rare subtype that remain true even in the new environment