Some studies have shown that the protection rate of the new crown vaccine ranges from approximately 65.9% to 90.3%. The rate of protection is evaluated in four ways: prevention of death, prevention of severe illness, prevention of hospitalization, and prevention of infection. The new coronavirus vaccine was developed to target the new coronavirus. According to the study, 14 days after vaccination, the protection rate of New Coronary Vaccine is about 86.3% against death, 90.3% against severe illness, 87.5% against hospitalization, and 65.9% against infection. Depending on the individual’s own condition, adverse reactions such as redness, swelling, itching, allergy and nausea may occur. Clinically, pregnant women, children under 3 years old, people with fever and acute illnesses should postpone vaccination. People need to understand vaccines scientifically. Vaccines do provide a certain degree of protection and can significantly prevent the rate of severe illness and mortality from infections. However, it is impossible to achieve 100% protection with any vaccine.