Three residents of the Dorsett Wanchai Hotel have been diagnosed. Yuan Guoyong, Chair Professor of the Department of Microbiology of the University of Hong Kong, visited the site today (17th) and believed that two of them had infected the foreign domestic helper in the opposite room in the hotel.
All three of them had been vaccinated with two doses of Fubitai vaccine. When asked why the infectivity was still so alarming, Yuan Guoyong said that the vaccine protects the lungs well and will not cause severe illness after infection, but the protection of the nasopharynx is weaker. It can still breed and infect others.
He also pointedly pointed out that "don’t think about the immune barrier again." Foreign experience shows that even if the vaccination rate exceeds 70%, there will still be a big outbreak. Even if 90% of people in Hong Kong receive injections, 10%, or 750,000 people, may still be infected. The mortality rate is 1%, and 7,500 people will die. Therefore, all Hong Kong citizens should also be vaccinated against the new crown to protect themselves, achieve customs clearance and relax social distancing.
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After investigation, Yuan Guoyong discovered that during the period when a couple opened the door to hand in test samples, the virus in the room was suspected to flow out of the corridor and then into the domestic helper's room to cause infection.
All three of them had been vaccinated with two doses of Fubital vaccine in Hong Kong. When asked why the infectivity was still so alarming, Yuan Guoyong explained that the vaccine protects the lungs, and there will be no pneumonia or serious complications after infection. The nasopharynx is less protected, and the virus can still multiply and infect others.
However, after the infection of people who have been injected, the amount of virus in their bodies will soon fall, neutralizing antibodies will rise, and the time to release the virus will be shorter, which will have a smaller impact on other people. He urged the public to still get the injections as soon as possible.
Yuan Guoyong urged the public to stop expecting the percentage of citizens to get herd immunity after getting an injection. Instead, everyone should get an injection to hopefully pass customs and relax social distancing measures.
(Profile picture / Photo by Luo Junhao)
A few months ago, local experts said that if the vaccination rate reaches 70%, herd immunity can be achieved. Today, Yuan Guoyong pointed out that "don’t consider the immune barrier again" because foreign experience shows that even if the vaccination rate exceeds 70%, there will still be a big outbreak. Even if 90 adults in Hong Kong receive injections, 10%, or 750,000 people, may still be infected, and most elderly people in Hong Kong have not received injections. Assuming that the death rate is 1%, 7,500 people will die.
He urged the public to stop expecting the percentage of citizens to get herd immunity after injections. Instead, everyone should get injections before customs clearance and social distancing measures can be relaxed. He reiterated that unless there is an acute immune response to the vaccine, they should all inject.
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As for the third shot, he said that foreign data indicate that if there are immune system problems, such as transplant patients, lymphoma patients, blood cancer patients, they should get the third shot, but whether all elderly people need to get the third shot? You need more data to determine.
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