这些和流感有关的说法可信吗

Core Viewpoint - The article emphasizes the importance of understanding the flu and its prevention methods, particularly the risks associated with the misuse of antiviral medication Oseltamivir and the necessity of flu vaccination as the most effective preventive measure [2][3][5][10] Group 1: Misuse of Oseltamivir - There are claims that long-term use of Oseltamivir can prevent flu, which experts strongly oppose, stating that the drug should not be used casually [2] - Oseltamivir is effective only when taken within 48 hours of flu symptoms appearing, and its use for post-exposure prevention is limited to high-risk groups [2][3] - Misuse of Oseltamivir can lead to adverse effects such as nausea and potential neuropsychiatric reactions, as well as the risk of developing drug-resistant virus strains [3] Group 2: Understanding Flu vs. Common Cold - The article clarifies that flu is a serious respiratory illness caused by the influenza virus, distinct from common colds caused by other viruses, with significant differences in symptoms and complications [4][5] - Flu symptoms include high fever, muscle aches, and severe fatigue, while common colds typically present milder symptoms [4][5] - The World Health Organization reports that flu can lead to 3 to 5 million severe cases and 290,000 to 650,000 respiratory disease-related deaths annually [5] Group 3: Immunity and Vaccination - Immunity from a previous flu infection lasts only 6 to 8 months, not a lifetime, due to the virus's ability to mutate [6][7] - Vaccination is recommended for everyone aged 6 months and older, with the timing of vaccination being crucial for effectiveness [8][10] - Individuals with mild cold symptoms can receive the flu vaccine, but those with fever or severe symptoms should postpone vaccination [8][9]