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Home / Health / Mutated coronavirus mutations are becoming a growing threat

Mutated coronavirus mutations are becoming a growing threat



Although the emerging variant of the coronavirus is still a threat, health experts say they hope that increased vaccination rates and continued use of masks can curb the possibility of a new wave of epidemics.

What is really worrying is whether the immunity provided by the vaccine will reduce the effectiveness of certain coronavirus variants, including the B.1.351 strain first discovered in South Africa and the B.1.427/B.1.429 strain produced in California. .

Researchers at the University of California, San Francisco said that in laboratory tests, the California strain was more resistant to neutralizing antibodies produced by the immune system in response to the COVID-1

9 vaccine or previous coronavirus infections. Researchers at the University of California, San Francisco say that compared with other variants, the protection provided by the antibody is reduced by a “moderate…but significant” amount.

When neutralizing antibodies resist native strains, their effectiveness is reduced by half. In contrast, when these antibodies encounter the coronavirus, Now dominates in South Africa, Its effect has been reduced to one-sixth of the usual level.

Vaccine manufacturers have begun to study enhanced injections, which will be a better choice for new variants. But researchers say that vaccines are still very good vaccines, and they are still our best choice for protection from viruses. Doctors urge people to act as soon as possible if they meet the conditions.

Dr. Eric McDonald, Medical Director of the Epidemiology Department of San Diego County, said this week that the vaccination campaign is an important reason for the continuous decline in daily coronavirus cases, and this trend is gratifying.

McDonald’s said that even though the California strain is “more contagious than other strains that spread in the community, the message to take home is the same: you need to do everything we recommend to prevent spread — so wear a mask, Stay away from social interactions and stay at home.”

Andy Slavitt, a senior adviser to the White House on COVID, said: “We can’t say it more easily: We think it’s a mistake to give up gasoline too early, especially when we are now speeding up vaccination efforts. -19 Response team.

Vaccination has become a factor in the decrease in the number of new coronavirus cases in Los Angeles County, and in fact so many residents have gained some immunity through exposure to the virus. Health officials also believe that since the beginning of the autumn and winter tides, residents have more adhered to the guidelines on wearing masks in public places and avoiding social gatherings. (Officials have not yet noticed a surge in cases related to Super Bowl weekend gatherings.)

The director of public health, Barbara Ferrer, said this week that in the skilled nursing facilities of Los Angeles County-where the vaccine was originally vaccinated-new coronavirus cases have plummeted every day in recent days. As of February 7, the average daily number of coronavirus cases related to residents in skilled nursing facilities was only five. Four weeks ago, this number exceeded 100.

As of February 14, 74% of eligible residents of Los Angeles County are eligible to be vaccinated in skilled nursing facilities, and 77% of staff have received the first dose of COVID-19 vaccine. Among those who took the drug for the first time, 83% of employees and 79% of residents also received the second injection.

Ferrer said: “As more staff and residents receive vaccinations, the number of new cases should continue to decrease. This does mean fewer outbreaks. Fortunately, the number of deaths has also decreased.”

The most important infectious disease expert in the US government, Dr. Anthony Fauci, said the rise of these variants has made it even more important for people to get vaccinated as soon as possible.

Fauci has raised concerns that the “best to survive” race between the British and California variants may accelerate the spread of the strains that best evade the COVID-19 vaccine. Fauci told The Times that the best way to prevent this is to stop the spread of the two variants by vaccinating, wearing a mask and limiting contact with others.

The number of new daily cases in California has dropped sharply, but the weekly decline in recent days has weakened. As of Thursday, California has an average of about 5,800 cases per day, a 21% decrease from a week ago. The decline in the previous week was even greater at 34%.

Federal officials expressed concern on Friday that due to a nationwide increase in a mutated variant from the United Kingdom, the country’s daily decline in coronavirus cases has begun to flatten out.

They warned states to relax restrictions on COVID-19, saying that the country is still in a state of instability, and there is a risk of a fourth surge before more people are vaccinated.

Fauci told reporters at a briefing on Friday: “We are in a very unstable position, just before the downturn surges-any disruption that may occur there may give us another surge.” You don’t want people to always look at the dark side of things, but you have to be realistic. Therefore, before we begin to understand, we must take a closer look at what happens in the next week or so. [decisions] Relax some restrictions. “

Since the autumn and winter climax in early November began to accelerate rapidly, the average daily number of coronavirus cases in California has been at its lowest point. Since the beginning of January, the number of cases per day across the state has dropped by 87%, when there were 45,000 new cases per day.

The number of COVID-19 inpatients in California dropped by 75% from the peak of 21,936 on January 6; as of Thursday, this number had fallen to 5,590, the lowest level since November 23.

In addition, the number of people with COVID-19 in California’s intensive care unit dropped by 66%, from a peak of 4,868 on January 10 to 1,640 on Thursday. This is the lowest number since November 28.

In the past seven days, the positive rate of coronavirus test results reached 2.7% on Friday, a sharp drop from the peak of the winter surge, when the winter positive rate reached 14.34% during the seven days to January 7. The positive rate in California is currently The lowest since mid-October.

Hundreds of COVID-19 deaths are still reported every day, although its incidence is lower than the peak of approximately 562 deaths per day in late January. According to The Times, on Thursday, 61 local health agencies in California reported 401 COVID-19 deaths. According to an incomplete early investigation, another 395 people had died by Friday night.

Since the beginning of the pandemic, California’s local health agency has reported a total of 51,788 COVID-19 deaths in the state. On a per capita basis, California ranks 30th in cumulative COVID-19 mortality among the 50 states and the District of Columbia.

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