It is normal for cats to sleep all the time after being vaccinated. Generally, cats are prone to symptoms such as poor energy, loss of appetite, lethargy and other reactions within two days after being vaccinated. If the cat does not recover within three days, it is best to take the cat to a pet store. Check it out at the hospital. After the cat is vaccinated, the cat needs to be supplemented with nutrition, and the cat cannot be bathed immediately, otherwise the cat will easily get sick and catch a cold.