Recently, many people have reported that they have been infected with the new crown virus for the second time, why is it "two yang"? What are the symptoms of "Eryang" that are milder than the symptoms of "Shouyang"? How to deal with "Eryang"? How to get the new crown virus vaccine in the near future? I heard that there is a new covid vaccine ... Authoritative Q&A is coming!
"Yang passed", why is it still "two Yang"?
According to relevant laboratory studies and real studies in Singapore and other places, the antibodies produced after the new coronavirus infection can protect the human body within 4-6 months; However, if it is faced with variant XBB, its protection may be weakened, and some secondary or superinfection may occur. This states:
1. For people who have been previously infected with the new crown virus or rely on vaccination to obtain an immune barrier, over time, the level of new crown virus antibodies in the body gradually decreases, and the immune protection gradually decreases;
2. The new coronavirus continues to mutate, which can break through the previous immune barrier, which will cause new variant infections.
This is the fundamental reason for the emergence of "two yangs".
Source: Visual China
What to do once "Eryang"?
"Eryang" is mainly manifested as fever, cough, sore throat and body aches. If you and your family experience the above discomfort, you can take your own antigen test. If you test positive for antigen, rest at home and don't go to work and school with illness.
Generally speaking, the symptoms of "two yang" are lighter than those of "first yang", and symptomatic treatment is the mainstay. When "Eryang" rests at home, pay close attention to the changes in symptoms, and if you find that the symptoms are progressively aggravated, you should seek medical attention in time. For the elderly and people at high risk of severe disease with serious underlying diseases, if infection occurs, focus on monitoring blood oxygen saturation, if the blood oxygen saturation is lower than normal, you should go to the hospital immediately.
With the increase of "two yangs", how to do personal protection?
Avoid going to places where many people gather, pay attention to hand hygiene, go to a closed environment with many people, wear masks, and maintain social distance.
High-risk groups, those who have not been vaccinated, are recommended to be vaccinated to prevent the occurrence of severe disease.
According to the requirements of the "Vaccination Work Plan for Responding to the Recent Outbreak of New Coronavirus Infection", it is recommended that the target groups of 2 major categories and 4 sub-categories complete the new crown virus vaccination as soon as possible and build a comprehensive immune barrier.
Do I need to be vaccinated again after "Yang"?
The World Health Organization said that current research shows that for the prevention of severe new crown disease, the double protection of infection and vaccination is stronger than the protection formed by infection alone or vaccination alone. Therefore, people who have been "impotent" but have not completed basic immunization still need to be vaccinated to obtain double protection.
Who needs to be vaccinated?
At this stage, the following groups of people still need to be vaccinated:
(1) People aged 3~17 who are not infected and have not completed basic immunization;
(2) People over 18 years of age who are not infected and have not completed the first dose of booster immunization;
(3) Key high-risk groups over 18 years old who are not infected and have not completed the second dose of booster immunization, including groups at high risk of infection, the elderly over 60 years old, people with more serious underlying diseases, and immunocompromised groups.
What is the interval between COVID vaccinations?
(1) Uninfected people
1. Complete subsequent doses of vaccination in accordance with the established immunization procedure and its time interval requirements.
2. For people over 18 years old who have completed basic immunization, the interval between the first dose of booster immunization and primary immunization has been adjusted from 6 months to more than 3 months.
3. For key high-risk groups over 18 years old who have not completed the second dose of booster, the interval between the second dose of booster and the first dose of booster is still more than 6 months.
(2) People who have been infected and have not completed basic immunization can receive 1 dose of vaccine 3 months after infection.
Are there new vaccines? What is the China quadrivalent new crown vaccine? Is the mRNA new crown vaccine on the market?
Recently, the 4-valent new crown vaccine of Shenzhou Cell and the new coronavirus mRNA vaccine of CSPC Pharmaceutical Group have been approved for marketing.
China cell recombinant new coronavirus 4-valent S trimer protein vaccine is a new generation of 4-valent improved vaccine independently developed by Mainland, its active ingredients include four variants of Alpha, Beta, Delta and Omicron recombinant S trimeric protein antigen, suitable for the prevention of new coronavirus infection, the vaccine has shown good safety and broad-spectrum immunoprotective effect in a number of clinical studies.
mRNA vaccines usually use lipid nanoparticles to deliver mRNA (messenger ribonucleic acid), mRNA can directly express antigens in cells, and produce strong humoral immunity, cellular immunity and long-term immune memory through antigen presentation, which is advantageous in preventing severe disease and sustained protection. At the same time, mRNA vaccines do not require adjuvants, virus preparation or recombinant protein preparation process, as long as the viral gene sequence is known, it can be quickly developed, which is very suitable for the prevention and control of rapidly mutating and widely epidemic new coronaviruses. CSPC's new coronavirus mRNA vaccine covers the core mutation site of Omicron, which has a good cross-protection effect against Omicron strain.
The above two vaccines are among the priority booster vaccines in the current Vaccination Work Plan for Responding to Recent Coronavirus Outbreaks, which are suitable for people over 18 years of age.
Which coronavirus vaccine should I choose at this stage?
The basic immunization of uninfected people can choose new crown inactivated vaccine, Zhifei recombinant vaccine and adenovirus intramuscular vaccine; Priority is given to recommending the recombinant 4-valent S trimeric protein vaccine and CSPC mRNA vaccine for booster immunization, and other recombinant protein vaccines or viral vector vaccines that have been approved for conditional marketing or for emergency use can also be selected for sequential booster immunization. See the table below:
Yangtze Evening News/Purple Cow News reporter Yang Yan
Proofreader: Li Haihui