【fmchdoctor】評論
(A)屬於B型流感,曾因為抗原突變造成全球大流行 抗原轉變才會引起全球大流行Genetics • influenza viruses have 8 segments in the genome• genetic/antigenic shift ◦ reassortment of viral genome segments, such as between human and swine strains, can cause pandemics• genetic/antigenic drift random mutationsin the H or N gene can cause epidemics