The new crown vaccine may not provide long-term immunity

anthony Fauci, the chief U.S. infectious disease scientist and White House health adviser known as "Zhong Nanshan", said he was concerned about the "persistence" of a potential new vaccine, according to CNBC. He says it's possible it doesn't provide long-term immunity.In an interview with JAMA editor Howard Bauchner late Tuesday local time, Fucci said: "If the new coronavirus is like other coronavirus, then the vaccine may not last long."said: "When you look back at the history of coronavirus, the common coronavirus that causes the common cold, the literature reports that protective immunity lasts from three to six months, almost not more than a year. This is not very durable protection. Atcurrently, Fucci is directly or indirectly involved in four trials of a potential new crown vaccine. By early 2021, he said, hundreds of millions of doses of the vaccine are expected to be available.Asked if scientists could find an effective vaccine, Mr Fucci said he was "cautiously optimistic", adding that there was "no guarantee". He warned that it "may take at least a few months to get an answer" before scientists find out if the vaccine is effective.U.S. officials and scientists hope to develop a vaccine to prevent new coronary pneumonia in the first half of 2021, 12 to 18 months after Chinese scientists first discovered the new coronavirus and shared its genome sequence with the world.But this is already a record-breaking time frame. An effective and safe vaccine usually takes 10 years to develop and test. The fastest-growing vaccine in history is the mumps vaccine, which took more than four years to develop and was licensed in 1967.For now, however, scientists don't fully understand the key aspects of the new coronavirus, including how the immune system reacts once a person is exposed to the virus. They believe the answers to these questions could have a significant impact on vaccine development, including how quickly it can be rolled out to the public.In testimony before Congress last month, Folch said he hoped scientists would find a viable candidate vaccine, but warned of potential flaws in the development of any vaccine."You can get everything you think you're ready ready, but can it finally prove to be a protective and persistent immune response?" said Folch of the vaccine. So the biggest unknown is, will it work? Given the way the body responds to these viruses, I am cautiously optimistic that we will have a vaccine that will get an effective signal. The
(China Biotechnology Network WeChat Public Number)