Vaccines needed to stop the spread of COVID
FRIDAY, March 19, 2021 (HealthDay News) – Less than one in 10 people in Wuhan carried COVID-19 antibodies in their blood for four months coronavirus the appearance in the Chinese city was an announcer from all over the world pandemic, a new study shows.
In addition, according to a report released on March 18, about 40% of the positives that found the neutralizing antibodies needed to prevent future infection tested positive. Lancet magazine.
According to these data, a large part of the population of Wuhan remained uncontaminated a few months after the outbreak, and therefore a massive vaccination will be needed to achieve herd immunity, Chinese researchers have argued.
“Even at the epicenter of the pandemic, with more than 50,000 cases confirmed as of April 8, 2020, the estimated seroprevalence [bloodborne evidence of infection] Wuhan remains low, ”he suggests vaccines should be encouraged herd immunity, The author of Dr. Chen Wang’s research said in a new journal. He is the president of the Chinese Academy of Medical Sciences and Peking Union Medical College.
A U.S. expert was unaware of the findings.
COVID-19 The expansion of Wuhan was hampered by harsh government-imposed blockade measures, said Dr. Amesh Adalja, a senior researcher at the Johns Hopkins Center for Health Security in Baltimore.
That’s why it’s hard to compare Wuhan’s experience with U.S. cities with fewer restrictive measures and higher infection rates, he said.
“In cities with similar aggressive measures in Wuhan, vaccines would continue to be a solution to protect the population from resuscitation cases,” Adalja said. “Wuhan’s low prevalence does not apply to other cities that have had much higher seroprevalence.”
The researchers reported that a survey of more than 9,000 residents of Wuhan revealed that only 7% of the city’s population had COVID-19 antibodies in April 2020.
About 40% of them had neutralized antibodies against COVID, and subsequent blood sampling found that these antibodies had been at a stable level for at least nine months, the study found.
The researchers said that people with symptoms similar to COVID or COVID produce higher levels of neutralizing antibodies than those who are infected but asymptomatic.
The researchers wrote that more than 4 in 5 of KOVID infections were asymptomatic. “They have suggested that the symptoms of many infected people may be too mild.”
“Extraordinary, rapid and effective control measures in Wuhan can reduce the spread of the virus, but can also reduce the immunity of naturally occurring herds by cutting off the development of persistent neutralizing antibodies,” researchers at the Peter Doherty Infection Institute in Melbourne and Immunity wrote in a joint comment.
“Effective global management of COVID-19 will succeed or fail based on natural infections and especially vaccine-induced immunity. Due to the limited inability to neutralize antibodies through natural infection, the study … reinforces the need for effective COVID. 19 vaccine population at the level of disease control, ”said Dr. Richard Strugnell and Dr. Nancy Wang.
The U.S. Centers for Disease Control and Prevention has more COVID-19.
SOURCES: Amesh Adalja, MD, expert, Johns Hopkins Center for Health Security, Baltimore; Lancet, study and news, March 18, 2021