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Written by: Zhong Yan
2021-05-23 14:38
Last update date: 2021-05-23 14:38
Hong Kong’s new crown vaccination rate has not reached 20%. Earlier, it was suggested to lower the vaccination age threshold. Schools with a vaccination rate of 70% can resume classes in full and do not need to wear masks.
CUHK Chair Professor of Respiratory Department Xu Shuchang said in an online forum that not wearing a mask is "too early", meaning that even if the public has completed two doses of vaccines and produced enough antibodies, they should still wear a mask because the vaccine purchased in Hong Kong protects The highest rate is 95%. In addition, after taking off the mask, infectious diseases such as influenza will raging again. People may be sent for quarantine because of symptoms similar to new coronary pneumonia.
Xu Shuchang, a government expert consultant and chair professor of the Department of Respiratory System at CUHK, believes that it is still too early to say that masks should not be worn after the two doses of vaccines.
(Information Picture/Photographed by Li Zetong)
Earlier, Liu Yulong, chairman of the Scientific Committee on Vaccine Preventable Diseases, suggested that after the vaccination age is reduced to 12, the vaccination rate in schools can reach 70% to 80%, and classes can be resumed without the need to wear masks. After the vaccination rate in Israel reaches 81%, the outdoors will be allowed No need to wear a mask.
When Xu Shuchang attended an online forum organized by the Hong Kong Academy of Nursing today (23), he was asked whether he still needs to wear a mask after receiving two doses of the vaccine. He thinks it is still "too early to talk about". Hong Kong’s current vaccination rate is low. The first batch of vaccines purchased by the government has the highest protection rate, which is only 95%. There is still a chance of getting sick. In addition, if you suddenly don’t wear a mask, infectious diseases such as influenza will spread again. The new crown pneumonia is similar, and citizens still have to be quarantined if there is a chance.
Herd immunity can only be achieved when the vaccination rate is 60%
He said that Hong Kong needs a 60% vaccination rate to have herd immunity, but the vaccination rate has not reached 20% so far. He believes that the public's doubts about vaccination should be eliminated and more people should be encouraged to get injections.
He pointed out that the current situation of stroke and miscarriage after vaccination is not different from the general situation. He also said that some people want to wait for a more perfect vaccine to be "quite unrealistic."
He believes that it is a trend to allow travelers to go abroad to avoid hotel quarantine after being vaccinated, and hopes to provide incentives for injections.
Xu Shuchang took the case of a 33-year-old man from Ju Luquan Building as an example. Even though he began to have lung blossoms earlier than the 4th day of admission, the bronchial swab samples could not be tested positive for the new crown virus until 8 days after the fever.
(Screenshot of online forum)
Xu: A large-scale outbreak has occurred after Taiwan relaxes the number of pilot quarantine days
Xu Shuchang said that there is no herd immunity in Hong Kong, and loopholes in border quarantine are prone to outbreaks again.
He took Singapore as an example. He pointed out that the local vaccination rate was nearly 30%, but because airport employees were infected with the new crown virus and spread in public cafeterias, the epidemic broke out again.
He continued that Taiwan has also managed to control the epidemic for a long time, but after relaxing the number of pilot quarantine days, a large-scale outbreak occurred again.
In addition, Xu Shuchang also pointed out that the new crown virus is difficult to detect. In a total of 1,070 samples from 205 patients, the positive rate of RT-PCR for ribonucleic acid detection can reach 93%, nasal swabs are 63%, and throat swabs are only 32%.
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