On 20 November 2022, the Public Health Schools of Harvard, Yale, and Stanford, three US universities, were posted on medRxiv. The latest research progress of Omicron immune defense in US population was uploaded.

The results: As of November 10, 2022, 94 percent of Americans are expected to have had at least one infection with COVID-19; 97.8 percent of Americans are immune to the novel coronavirus; The study also warns of the need to watch out for a new wave of COVID-19 infections as the virus evolves and immune antibodies continue to decline.

These figures show that the infection rate of the novel coronavirus in North America has reached 94%, which is almost universal.

For the past nine months, I've been in North America, in and out of supermarkets, hotels and airports, all very crowded places. I haven't worn a mask, and I haven't been infected. I would like to share with you my experience in protection for the reference of friends in China who are suffering from the epidemic.

First, every time I come back to the car after appearing in a crowded public place, I must spray my hands with at least 75% alcohol content. After rubbing my hands, the alcohol will evaporate, and I will breathe the volatilized alcohol through my nose.

Second, and I think this is the most important, when I get home, I apply a hot water bag to my chest, throat and nasal cavity continuously. This is because the novel coronavirus is a protein structure that degrades when the temperature exceeds 40 degrees Celsius. The way the immune system runs a fever, it heats up the body so that the proteins of the virus break down. The physical conduction of heat in the hot water bag can instantly raise the temperature of the lungs, upper respiratory tract and nasal cavity, which are prone to COVID-19 infection, to at least 45 degrees Celsius. Even if these areas fall into the virus, they will be degraded by the high temperature in an instant.

The instant physical conduction of heat in the hot water bag makes the temperature of susceptible areas rise sharply, which is not only low cost and high efficiency for the prevention and treatment of the novel coronavirus infection, but also has a very significant effect.

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