Inactivated vaccines usually refer to inactivated neocoronavirus vaccines, and there are relevant studies demonstrating that inactivated neocoronavirus vaccines are also effective against omicron. To the best of our knowledge, the available vaccines provide at least partial protection against the different variants. And they remain effective in preventing severe infections caused by the various variants of the virus. No new crown vaccine is 100% effective, but current clinical evidence suggests that the vaccine is still highly effective in reducing severe illness and hospitalization rates. There are different types of vaccines, all of which cause the body to produce antibodies, as it does after infection, which prepares the immune system to attack the pathogen in the future. Most vaccines are injectable, but other dosage forms are available. Some vaccines require >1 dose to adequately prevent infection. Interrupting the spread of the epidemic requires sufficiently broad vaccine coverage, and it is recommended that individuals maintain their health by actively immunizing themselves with the new crown vaccine as their medical condition permits.