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Vaccinated people can spread the virus, but rarely, the CDC reports

People who are fully immunized with so-called groundbreaking infectious diseases, with yet another unexpected and unwelcome twist in the national pandemic. Delta variant The Centers for Disease Control and Prevention said in a report released Friday that it could spread the virus to others as easily as unvaccinated people.

Vaccines maintain a strong effect on severe illness and death, and infections in vaccinated people are considered to be relatively rare. However, this revelation followed a series of other discoveries about the delta mutant this week, all of which overturned scientists’ understanding of the coronavirus.

In a report released Friday, authorities described a single outbreak in Provincetown, Massachusetts.

An internal combustion engine document obtained by the New York Times on Thursday night raised even more dire questions about the virus and its trajectory. In summary, the data collected by the CDC casts doubt on the country’s plans to return to offices and schools this fall, and revives the difficult questions Americans wanted about masking, testing, and other precautions.

The investigation immediately announced this week’s authorities’ decision to advise even vaccinated Americans to resume wearing masks in indoor public areas of the virus-proliferating community.

Authorities concluded that even vaccinated people had higher levels of the virus when infected, and that they were as likely to be infected with the virus as unvaccinated people. If so, they may be contributing to the increase in new infections — perhaps much less than unvaccinated.

Dr. Robert Wachter, Dean of the University of California, School of Medicine, said: San Francisco.

Knowing how different the Delta variant is from the original virus is “just annoying,” he added. “The brain doesn’t like to keep moving like this.”

Outbreak studies show that Delta is much more contagious than the original virus and seasonal influenza and is as contagious as chickenpox, according to internal documents circulated within the CDC.

Breakthrough infections among vaccinated people were always expected, but until the arrival of the delta mutant, vaccinated Americans were not expected to become a new source of infection. ..

Vaccines, in any form, remain the only reliable shield against the virus. Nationally, about 97% of people hospitalized for Covid-19 are unvaccinated, according to CDC data.

Angela Rasmussen, a research scientist at the Vaccine Infectious Diseases Mechanism at the University of Saskatchewan, Canada, said:

“Masks are a wise precaution, but the majority of infections are in unvaccinated people and are still at greatest risk,” she added.

The studies collected highlight the urgency of increasing the pace of vaccination in the United States and reducing the number of people susceptible to severe illness. This week, the pace of vaccination in the European Union has surpassed that in the United States for the first time.

Authorities raised concerns about the spread of the virus in a Friday report, calling for precautions to be taken even in jurisdictions where virus levels are undetectable. However, the CDC’s internal documents sounded a much more alarming note, advocating universal masking for everyone, regardless of the level of infection in the area, and recommending authorities “acknowledge that the war has changed.” did.

As of Friday, the average number of cases per day was about 72,000, and immunized people with young children, older parents, or friends and families with weak immune systems protect vulnerable people in orbit. You need to wear a mask for this. Lower infection rate.

To be sure, the questions that Americans are currently facing are almost inexhaustible and seem to be almost unsolvable. Does the company need to bring employees back to work if vaccinated people have the potential to occasionally spread variants? What does this mean for shops, restaurants and schools? Is the unmasked family gathering away from the table again?

The unpredictable nature of Delta has humbled scientists who expected the virus to cause predominantly sporadic outbreaks in areas with low vaccination rates. In the United Kingdom, where variants appear to have subsided after the surge, vaccination is spread by age, with a much higher proportion of people over the age of 50 being vaccinated than in the United States.

However, vaccination rates are much more volatile in the United States, said Birhanage, an epidemiologist at Harvard TH Chan Public Health School. “In conclusion, what Delta is doing in the UK does not mean that vaccination will take place in a great variety of places,” he said.

Without the variant, “things would be worse than before,” he added. “But it will be much better than without vaccination.”

This month’s outbreak in Provincetown, Massachusetts strongly supports the idea that even fully immunized people can unknowingly spread the virus. In an email to the Times this week, CDC director Dr. Rochelle Walensky said, “We believe they may do so at the individual level, which is why we updated our nominations.” Said.

The outbreak occurred after more than 60,000 delights celebrated July 4th in Provincetown, crowded bars, restaurants, guesthouses, rental homes, and often indoors.

By July 10, there was a marked increase in cases among the county residents, including those who were fully immunized. A week later, the county’s daily average surged from 0 to 177 per 100,000 people.

“Vaccines are like hip waders,” said Dr. Rasmussen. “Walking the river keeps it dry, but when it gets too deep, water begins to flow from above, which seems to have happened in the Massachusetts outbreak.”

Three-quarters of people infected in Provincetown report having a cough, headache, sore throat, or fever (a symptom of an upper respiratory tract infection), and 74% are fully immunized. Was known.

Of the five hospitalized, four were completely vaccinated. One was the Pfizer-BioNTech vaccine and three were the Johnson & Johnson vaccine. Two of the patients had an underlying medical condition. Genetic analysis of 133 cases identified a virus closely associated with the delta mutation in 119 and 1 in one.

scientist Warning last year It means that the vaccine may not be able to completely prevent the infection or infection. However, experts did not expect these events to have a significant impact on the fight against the virus, nor did they anticipate how quickly Delta variants would destroy the country.

“Two months ago, I thought we got over the hump,” Dr. Wachter said. In San Francisco, the country’s most vaccinated metropolis, 77% of people over the age of 12 are vaccinated.

Still, the number of hospitals he works for has skyrocketed from one in Covid-19 on June 1st to 40 now. Fifteen patients are receiving intensive care.

“I find it very difficult to estimate what will happen to a 30% vaccinated area if 70% or 75% immunity does not protect the community,” Dr. Wachter said. I have. “Humility may be the most important thing here.”

Vaccinated people can spread the virus, but rarely, the CDC reports

Source link Vaccinated people can spread the virus, but rarely, the CDC reports

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