When New Year’s Day 2019 came, and it was also the midwinter season, Xiao Lin’s cough continued for a month, and then she suddenly developed a fever and became more and more asthmatic. The hospital did its best to save her baby, but she was barely alive. Pregnant women, the elderly, children <5 years old, and people with low immunity and chronic diseases are at high risk for influenza during winter. If you are not careful, you may have the same tragedy as Xiao Lin. So how should the flu be prevented? First, influenza vaccination is the most effective measure to prevent influenza. Pregnant women should also be vaccinated against influenza, usually 2-4 weeks before the flu epidemic, so as to have an effective preventive effect. Second, for pregnant women who have been exposed to people with flu-like symptoms such as high fever, cough, sore throat, headache, etc., if they have not had the flu vaccine this year, considering the special characteristics of the pregnant women group and taking into account the pros and cons, they can take oseltamivir prophylactically, with the specific usage of one tablet once a day for 10 days. It can reduce the risk of critical illness of influenza in pregnant women. Thirdly, influenza is mainly spread through airborne droplets, so it is important to keep the environment clean and ventilated. Pregnant women should try to reduce their visits to crowded places during influenza season; pay attention to hand hygiene, wash hands regularly, avoid touching eyes, nose or mouth after coughing or sneezing; rest at home when symptoms of respiratory infection such as sore throat, coughing and sneezing occur. Once symptoms such as high fever, wheezing, chest pain and palpitations occur, you must seek medical attention as soon as possible to avoid serious complications such as myocarditis, pneumonia and sepsis, which can affect the health of pregnant women and the development of the fetus. In conclusion, pregnant women are a high-risk group for influenza. During the flu season, it is important to raise awareness of influenza prevention for the health of yourself and your baby.