Executive summary:The U.S. epidemic continues to rebound. U.S. media disclosed on the 29th that the country’s Centers for Disease Control and Prevention (CDC) report pointed out that Delta’s new crown variant virus is as infectious as chickenpox, and it has a stronger ability to break through the protection of the new crown vaccine, so it has been vaccinated. People with the vaccine may still be infected and infect others.
The U.S. epidemic continues to rebound. U.S. media disclosed on the 29th that the country’s Centers for Disease Control and Prevention (CDC) report pointed out that Delta’s new crown variant virus is as infectious as chickenpox, and it has a stronger ability to break through the protection of the new crown vaccine, so it has been vaccinated. People with the vaccine may still be infected and infect others.
The US “Washington Post” took the lead in reporting the contents of this internal document on the 29th, and the authorities later confirmed the authenticity of the contents. According to reports, the situation listed in the briefing prompted the CDC to update the epidemic prevention guidelines, recommending that people wear masks indoors even if they have completed vaccination.
The briefing pointed out that the basis for the CDC’s next action is to “recognize that this epidemic prevention war has changed.” CDC Director Valensky said that new research shows that people who have been vaccinated will carry a large amount of the virus in their nose and throat after being infected with the delta variant virus. Therefore, it is recommended that they wear masks again to avoid spreading the virus.
The US health authorities have repeatedly emphasized the urgent need for vaccination. CDC data shows that the new crown vaccine is still very effective in preventing severe illness, hospitalization and death of patients.
CDC documents show that the infectious power of the Delta variant has surpassed MERS, SARS and other viruses, and is as high as chickenpox. On average, each patient can infect 8 to 9 people. In addition, after being vaccinated, people who have been vaccinated will produce the same amount of virus as those who have not been vaccinated after being infected with the delta variant, and the infectivity is almost the same.
The document estimates that among the 162 million vaccinators in the United States, 35,000 people will have symptoms of infection every week. “Despite vaccinations, there will still be more breakthrough infections and community transmission.”
The United States has seen a surge in new crown cases in recent days, especially in areas where vaccination rates are still low. According to reports, the number of hospitalizations in parts of Missouri and Louisiana has risen, at the same level as during the worst period of the epidemic. In recent weeks, the number of new deaths per day in the United States has gradually increased, but it is significantly lower than the peak in spring.
Original title: Delta mutant virus accelerates spread in the United States CDC: infectiousness comparable to chickenpox