Due to the unique immune tolerance during pregnancy, pregnant women have lower resistance to diseases than the general population and are susceptible to influenza infection. To prevent influenza during pregnancy, pregnant women should try to avoid going to crowded, noisy, and crowded public places. On the one hand, the air in these places is polluted, affecting the oxygen supply to the fetus; on the other hand, the density of pathogenic microorganisms in public places is much higher than in other areas, and pregnant women have poor resistance.