流感疫苗需要每年接种由于流感病毒变异很快,通常每年的流行类型都不同。因此流感疫苗也和其他疫苗不同,需要每年接种最新的才能达到预防效果。同时,专家还提醒,接种疫苗要及时,最好是在流感流行高峰前1至2个月接种流感疫苗,推荐的接种时间为每年的9月到11月份。接种疫苗可有效 Flu vaccines need annual vaccination Because influenza viruses mutate rapidly, the prevalence is usually different each year. Therefore, flu vaccine and other vaccines are different, need to be vaccinated every year to achieve the latest preventive effect. At the same time, experts also warned that vaccination should be timely, it is best to flu vaccine 1 to 2 months before the peak vaccination influenza vaccine, the recommended vaccination time for each year from September to November. Vaccination can be effective