条件筛选
-
Does African swine fever infect sows first?
You cannot say that African swine fever infects sows first; you can only say that the incidence rate in sows is relatively high. And the reasons come down to three points: first, sows are bred, farrowed and lactated year after year, so their bodies suffer great depletion; second, immune function declines; third, toxins accumulate in large amounts. African swine