Experts interviewed said that there are many cases of confirmed in China, and the information collected by the contact persons may not be 100 % accurate, and some people may be missed.In addition, although the middle number of incubation period is only three days, in an interview, the maximum incubation period of the virus that caused most of the respiratory disease is 14 days, so the 14 -day isolation period implemented in Singapore is still appropriate.
A paper from the team led by Chinese epidemiological expert Zhong Nanshan stated that the latent period of the new coronary virus (referred to as the new coronary virus) in 2019 can be up to 24 days.Disputes are incomplete and caused by error attribution.In fact, the same papers also found that the mid -number of the incubation period was actually three days.
Dr. Paul Tambyah, president of the Asia -Pacific Society of Clinical Microbiology and Infectious Diseases, said in an interview with Lianhe Zaobao that there are many cases of diagnosis in China.
You thought it was a passed to B, and A and B were in contact with 24 days ago, which may be wrong.Maybe there is a in the middle, C and A earlier than B, and it is infected and then passed to B by C.
In addition, the paper does not explain the method of tracking contacts.
Temanda pointed out that the incubation period refers to the time when the virus invades the host cells, which generally does not need so long.The latent period of other coronary viruses such as SARS virus is two to seven days, the Middle East respiratory syndrome (MERS) virus is two to 14 days, and the influenza virus is two to four days.
Viruses destroy the cells from the cells after drawing nutrients, and then when the human immune system eliminates the infected cells, the patient will have symptoms.
The 37 -member team led by Zhong Nanshan published a clinical feature survey report called the clinical feature investigation report called China 2019 new coronary virus infection on the online medical preparatory archive platform MEDRXIV three days ago.The research team conducted a survey of 1099 confirmed cases of 552 hospitals in 31 provinces in China.In the annotation, MEDRXIV said: The results of this report containing medical research should not be used as a clinical reference.
Members of the research team pointed out the day before yesterday that it was a case of 24 days
The report shows that the latent period of the new coronal virus is from zero to 24 days. This extreme value is widely reported by media reports, which has attracted great attention.
What is not prominent is that the report also pointed out that the mid -range of the virus latency is three days.In fact, Guan Weijie, a member of the research team, told the Red Star News the day before yesterday that 24 days belonged to a example.
Although the mid -number period is only three days, Liang Haonan, a specialist in the infectious diseases of Elizabeth Hospital, believes that most of the virus that causes respiratory diseases is 14 days, so the 14 -day isolation period is still appropriate.
He said that Singapore is at the stage of preventing virus diffusion, and it is better to be careful.
According to the Ministry of Health, the authorities should refer to the best evidence and the practice of other countries, and pointed out that the current investigation is controversial. It needs to be carefully studied. The quarantine period is still preserved for 14 days.
Michael Ryan, the executive director of the World Health Organization, also expressed his views on a press conference the day before yesterday.
He also pointed out that there may be a long incubation period that may be due to the dual Double Exposure, that is, the patient may have been in contact with two patients, but in fact the person who was finally contacted was infected.
Extreme value often appears, which is usually caused by the way of exposure.When referring to extreme value, we must be very very careful.
Ryan emphasized that the investigation led by Zhong Nanshan's conclusion did not say that the incubation period was 24 days, and it only said that the median of the incubation period was three days.
