Vaccination to control community-wide outbreaks is most successful in small communities, when the campaign is started early and when high coverage of multiple age groups is achieved.
Prophylactic doses of acetaminophen given after vaccination reduce fever but blunt antibody response to multiple antigens.
接种后预防剂量的对乙酰氨基酚能够减少发烧，但是会削弱抗体对多种抗原的反应。
3
The clinical incidence of AR reduced from 51.39% to 1.39% when vaccination plus drug control, and multiple indexes were well improved for growing-finishing pigs.