How should we choose the three types of COVID-19 booster needles in China? Does COVID-19 vaccine have a validity period of only half a year

How to select the three types of COVID-19 vaccines in China

The three types of vaccines have their own characteristics, which can be roughly summarized as the following points, and can be selected according to needs:

inactivated vaccines need two shots, with mature technology and easy storage and transportation, but high production environment requirements and vulnerable production capacity.

Adenovirus vector vaccine only requires one injection, with immunogenicity close to natural, high yield, and low cost. The recombinant protein vaccine requires three doses, production does not require a complete virus, is safe and reliable, easy to mass produce, and has low cost. Compared with inactivated vaccines that are widely administered in China, adenovirus vector vaccines have the same target audience and site of administration, with similar adverse reactions, contraindications, and precautions.

Academician Chen Wei once said in an interview that if you want to take fewer shots and have a faster immune response, the protection rate will be more than 60% in 14 days, or you will go abroad or perform tasks after one shot. Adenovirus vector COVID-19 vaccine is the first choice.

From the results of clinical trial research, emergency use research and post marketing monitoring, the conditionally approved COVID-19 vaccine, including adenovirus vector vaccine and inactivated vaccine, has good safety. The adverse reactions after vaccination, like other vaccines, mainly include redness, swelling, hardening, pain, etc. at the vaccination site, as well as fever, fatigue, nausea, headache, muscle soreness, etc. Generally, no special treatment is required. If necessary, contact the vaccination site for guidance on disposal. Regardless of the type of vaccine, it has been approved by the national drug regulatory department and has good safety and immune efficacy. Citizens do not need to deliberately wait for a certain vaccine, nor do they need to think too much about the number of doses to be administered. As long as their physical conditions are met, they can be vaccinated as early as possible to obtain immune protection.

Is the protection period of COVID-19 vaccine only half a year?

The statement that "the protection period of COVID-19 vaccine only half a year" is taken out of context. "In fact, it is less than a year since the research and development of COVID-19 vaccine. At present, the data in China is only half a year, which proves that the vaccine is effective in less than half a year until [SEP]. As time goes by, the data will be updated at any time. If it is said that 'COVID-19 vaccine only protects for half a year', it is a misreading of vaccine protection. "