If Covid-19 acts like other coronaviruses, “it probably won’t last long,” said Fauci, director of the National Institute of Allergies and Infectious Diseases, in an interview with the editor of JAMA on Tuesday evening. , Howard Bauchner.
“When you look at the history of coronaviruses, the common coronaviruses that cause colds, reports in the literature indicate that the durability of protective immunity ranges from three to six months to almost always less than a year”, a- he declared. “It’s not a lot of durability and protection. “
The National Institutes of Health has accelerated work with biotechnology company Moderna on a potential vaccine to prevent Covid-19, which infected more than 6.28 million people worldwide and killed at least 375,987, according to data compiled by Johns Hopkins University.
Fauci said Tuesday the biotech company expects to recruit around 30,000 people when it begins a phase 3 trial in July. He said there were at least four trials for potential vaccines in which he was directly or indirectly involved.
Asked if scientists would be able to find an effective vaccine, Fauci said he was “cautiously optimistic,” adding that “there is never a guarantee.” He warned “it could take months and months and months to get an answer” before scientists find out if the vaccine works.
US officials and scientists hope a vaccine to prevent Covid-19 will be ready in the first half of 2021 – 12 to 18 months since Chinese scientists identified the coronavirus and mapped its genetic sequence.
This is a record time for a process that normally takes about a decade for an effective and safe vaccine. Development of the fastest vaccine ever, mumps, took more than four years and was authorized in 1967.
However, scientists still do not fully understand the key aspects of the virus, including the immune system’s response once a person is exposed. The answers, they say, can have great implications for vaccine development, including the speed with which it can be deployed to the public.
Fauci, the country’s leading infectious disease expert, said in a testimony to Congress last month that he hoped scientists would find a viable candidate, but cautioned against potential pitfalls in the development of any vaccine.
“You can have whatever you think is in place and you don’t induce the type of immune response that turns out to be protective and lastingly protective,” Fauci said of a vaccine. “So one of the big unknowns is, will it be effective? Considering how the body reacts to viruses like this, I am cautiously optimistic that we will get a signal of effectiveness from one of the candidates. “