Will Omicron be infected twice?

Repeated infection in COVID-19 refers to the situation in which a person is infected with COVID-19 virus and is infected again or more times after recovery.

Usually, after being infected with COVID-19 virus for the first time (or after vaccination), our body will improve the immunity of T cells, and memory B cells secreting antibodies will enhance their response to spike proteins and neutralize the effectiveness of antibodies.

So will the same person be infected by Omicron twice?

The answer is yes.

Previous studies have shown that the antibody level of patients with COVID-19 will drop rapidly after rehabilitation. China's research team reported in the British journal Nature Medicine in June that their investigation in Chongqing found that the total antibody level of about 90% cases would drop by more than 70% two months after discharge. Based on this, the researchers believe that COVID-19 infected people may be reinfected after rehabilitation. The newly reported cases of recurrent infection confirm the above conclusion, indicating that COVID-19 infected people may not be immune for life.

Academician Zhong Nanshan said recently that according to foreign data, once infected with Omicron, 78% people will not be infected again for a long time, regardless of symptoms.

Japan

In Japan, where data are still released normally, there were 5438+February 1 1 day in June, with1/9000 new infections, 190 deaths and 386 severe cases.

Since its discovery in 20021,1 1 year1October, the Omicron mutant has gradually replaced other mutants around the world and become the main strain causing the global COVID-19 epidemic. At present, after the gradual liberalization of China, the number of infected people has greatly increased. The main strains are BA.5.2 and BF.7, which are the main strains that cause infection in many places.

It is reported that the accelerated mutation of Omicron may shorten the time window of secondary infection and increase the possibility of multiple infections. In fact, since 2022, hundreds of variants have actually been found in Omicron, but repeated infections are rare.

How long does it take to repeat the infection?

In fact, Taiwan Province Province had a similar "invincible immunity" propaganda statement before. Simply put, if you have been vaccinated with two or three doses of vaccine and then infected with COVID-19 virus, you will automatically acquire invincible immunity, and you will not be infected again for a long time, just like eating invincible stars.

And the result?

According to the statistics of the epidemic command center, the number of reinfected people in Taiwan Province exceeded 30,000 within three months, and 2% of them were re-diagnosed within 1 month.

Doctors also warned that there is "no limit" to the number of times a person can be infected with COVID-19 virus.

Therefore, when the media publicizes, don't take it out of context, which can easily mislead the public.

Antibodies obtained by natural infection with Omicron will decrease with time. According to the data of the Ministry of Health, the earlier you are infected with the virus, the higher the risk of repeated infection.

As can be seen from the above figure, the infection risk of people who have been infected with the original strain or Delta strain before is basically the same as that of people who have never been infected, that is to say, there is no antibody.

However, if you are infected with Omicron strain this year, the risk of repeated infection within 1-3 months is very small.

As our reference, we don't have to worry too much about repeated infections within 1-3 months after yang.

In a paper recently published by Cao Yunlong, a domestic expert, the plasma of patients who broke through BA.5 infection after vaccination had higher neutralizing titers on BA.5 and BF.7 after one month of rehabilitation (that is, the anti-infection effect was better), but it had higher neutralizing titers on Bq.1.1./Kloc-0 (Bq./Kloc-0

Therefore, it is hoped that relevant departments and media will pay more attention to the epidemic situation of new strains, publish the latest data, and remind the public in time if there is an increase in new strains in China. It is convenient for people to further strengthen their self-defense and prevent a large number of repeated infections caused by new strains after the year, which will trigger a new infection peak.

For friends who are already positive, most people's symptoms will get lighter every time. Immunity acquired from the last infection can alleviate the symptoms of the next infection and reduce the hospitalization rate and mortality rate of the next infection [9].

However, for some elderly people or people with basic diseases, secondary infection in COVID-19 may aggravate symptoms and increase mortality.

For friends without Yang, then

Try not

Try to be late.

As little as possible

At present, the proportion of asymptomatic and mild patients in China is above 90%. The virus is confined to the upper respiratory tract and will not invade the lungs and cause lung inflammation. Some serious, critical and even fatal cases are mostly caused by the aggravation or deterioration of basic diseases caused by COVID-19. The current epidemic strain of Omicron, like influenza, will gradually fade and recover one week after infection.

What are the symptoms of COVID-19 in 7 days?

(For reference only, the actual symptoms vary from person to person)

The pathogenesis of ordinary young people is suitable for the above situation. People who have been vaccinated with COVID-19 vaccine and completed intensive immunization have a shorter course of disease and a lighter condition. However, the thermal process of some elderly people, especially those over 70 years old with basic diseases, is more complicated. Five days before and after virus infection, if the elderly have obvious symptoms of holding their breath, they need to use lung CT images to diagnose whether there is lung infection.

If you miss someone who is positive in COVID-19, what are the chances of infection?

It can be seen that wearing a mask is still necessary!

Finally, don't worry too much.

Many experts point out that Omicron has been infected.

99% can fully recover within 7- 10 days.

Therefore, do a good job in personal protection and vaccination.

Note: asymptomatic infected people do not need to take medicine or abuse antibiotics. Just prepare the medicine properly. There is no need to snap up or hoard.

Plan the quarantine period in advance, so you don't have to panic ~