今年流感高发时间提前！疫苗接种如何选择

Core Insights - The flu season is currently active in Guangdong Province, primarily driven by the H3N2 strain, with a noted increase in flu cases in outpatient departments [1][2] - The flu peak season in southern regions has arrived earlier this year, indicating a potential increase in flu intensity, necessitating early preventive measures [1][2] Vaccine Recommendations - Vaccination is the most effective method for preventing flu and its complications, recommended for all individuals aged six months and older, especially high-risk groups [2] - High-risk groups include children under five, the elderly, and individuals with chronic conditions such as cardiovascular diseases and diabetes [2] Vaccine Types and Administration - Various flu vaccines are approved in China, including trivalent inactivated vaccines, quadrivalent inactivated vaccines, and trivalent live attenuated vaccines [2][3] - The main difference between inactivated and live attenuated vaccines lies in their production methods and administration routes, with inactivated vaccines administered via intramuscular injection and live attenuated vaccines via nasal spray [2][3] Vaccine Safety and Efficacy - Both inactivated and live attenuated vaccines are considered safe and effective, with no significant differences in protective efficacy [3] - The majority of inactivated vaccines on the market are split vaccines, which are produced using a mature technology [3] Contraindications for Live Attenuated Vaccines - Specific populations are advised against receiving live attenuated vaccines, including immunocompromised individuals, children on aspirin therapy, and pregnant women [4][5]