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1。https://www.cdc.gov/flu-vaccines-work/benefits/index.html#:~::text = flu%20Vaccination%20 can can％20 kan can can％20 kely％20you％20 you％20 you;当％20FLU％20Vaccine，流感20By％2040％20％20％2060％25 2 https://www.cdc.gov/flu/vaccine-safety/?cdc_aaref_val=https://wwwwwwwwwwwwwwwwwww..cdc.gov/pleflu/pprevent/predem.https：/ https://www.cdc.gov/flu/signs-symptoms/?CDC_AAref_Val=https://www.cdc.gov/flu/symp toms/symptoms.htm 4. https://www.cdc.gov/flu-vaccines-work/how-well/index.html 5. https://www.cdc.gov/flu/vaccines/keyfacts.html6。https://www.cdc.gov/flu/vaccines/coadministration.html7。 https://www.cdc.gov/respiratory-viruses/risk-factors/older-adults.html#:~: text=In%20RE20RE cent％20岁％20岁2C％20IT估算，估计估算，人％20IN％20in％20IN％20次20Age％20GROUP。
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