Recently, the new crown epidemic has once again become the focus of society and the public. This time, various variants derived from the new coronavirus are infectious. They not only break through the acquired immunity of passive infection, but also make multiple vaccination protection "ineffective".

Simply put, a new wave of peaks highlights the new coronavirus"Reinfection"feature. Is this the new normal life that people imagine?

The vast majority of people have a cold experience, no one caresRepeated colds;Few people become seriously ill with colds Death and, more rarely, long-term sequelae following a cold.

But the new coronavirus is not the same, not only the infected people are seriously ill, but even die. It is estimated that nearly 18 million people worldwide died from the new crown virus infection in two years; even worse, there are tens of millions of people who suffer from "new crown sequelae" and live a long life.

At the beginning, experts did not realize that repeated infection with the new coronavirus became the "new normal", but predicted that the epidemic would soon evolve into an "endemic infectious disease" . Because from the perspective of viral diseases and the body's immune protection function, repeated infection of the same virus has little chance of causing disease, but the result is < span style="font-family:mp-quote, -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;color:#333333;font-size:14px;">“Look at the eye Covid-19!”

SARS-CoV-2virus actually shows "lightning evolution", and new variants emerge one after another. Reinfections are likely to be of a different subtype or variant. Dr. Fauci also had to admit that "I wouldn't be surprised if someone gets infected with the new coronavirus more than once a year."

More and more factsLet the experts admit that "this will be the new normal."

Can mixed immunity resist the new coronavirus and its variants?

Passive infection (natural infection with virus) and vaccination can improve immunity, Has double protection. Whether it can resist repeatedVirusInfection? The actual situation is still not satisfactory. span>

Certainly, the vaccine reduces the severity and mortality of patients. But the Omicron variant derived more subtypes, such as BA.2; BA.4 or BA.5; BA5.1 and so on. The latest research data show that multiple booster vaccinations plus acquired immunity after being infected with the new coronavirus are more effective in preventing "recurrent infections" than vaccination alone or passive immunity from natural infection.

University of California virus expert Professor Wachter said "You already have antiviral immunity, including immunity after natural infection and immunity induced by vaccination. These are not random No effect, just "weaker" than people expected.

In short, the new coronavirus cannot be completely eliminated. If vaccination or natural infection immunity, or both, can ultimately effectively improve personal immune protection, at least reduce the chance of dying from new coronavirus infection, it is also worthwhile.

Stanford University infectious disease experts believe that repeated infection strengthens cellular immunity, memory how to fight similar viruses, and the symptoms of reinfection may become milder. Of course, unpredictable new variants could also make infections more severe or deadly.

What else is "unknown"?

1. How to slow down the spread of the virus, so that the scale of infection becomes smaller and less frequent. In other words, don't break out a "pandemic" every three weeks. Slowing the spread of the virus can also help slow the emergence of new variants. They will continue to evolve.

2. The new coronavirus infection is still a relatively new disease, and the medical community still does not know how "recurrent infection" affects the body? Or what does "coronavirus sequelae" mean? Unfortunately, repeated infection by the virus can no longer assume possible consequences, but inevitable consequences - severely affect health strong>.

3. Who is a potentially high-risk "COVID-19 susceptible"? How or how to protect them? Elderly / children / or patients with underlying diseases?

4. Who is the next coronavirus variant?