今年流行毒株与去年不同，感染人数会更多！医生紧急提醒

Group 1 - The core viewpoint of the article highlights that this year's flu strain is different from last year's, with an increase in infection rates expected due to lower immunity against the prevalent H3N2 strain compared to last year's H1N1 strain [1] - The flu season has started earlier this year, with significant increases in flu cases reported in countries like Japan, the UK, Germany, and Italy [1] - Early identification of flu symptoms is crucial, as severe cases can lead to serious complications such as pneumonia and multi-organ failure [2][3] Group 2 - Vaccination is recommended between September and November for optimal protection, although it can still be administered throughout the flu season [4] - Annual vaccination is necessary due to the rapid mutation of flu viruses, which means that the strains may differ each year [5] - High-risk groups, including children under 5, the elderly over 65, pregnant women, and those with chronic health conditions, should prioritize vaccination [7] Group 3 - The article discusses the differences between trivalent and quadrivalent flu vaccines, with the latter providing broader coverage against an additional strain [8] - Vaccination should be conducted at qualified medical institutions, such as community health service centers or hospitals [9] - Individuals exhibiting flu-like symptoms should wear masks and seek medical attention promptly rather than self-diagnosing [10]