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How strong is the current epidemic strain in Beijing? Is it feasible for infected people to isolate at home? Why does the number of cases continue to increase? Expert explanation
The Omicron BF.
7 variant is the main strain
in the current round of the epidemic in Beijing.
What are its characteristics in terms of infectivity and pathogenicity?
7 variant is the main strain
in the current round of the epidemic in Beijing.
What are its characteristics in terms of infectivity and pathogenicity?
Li Tong, chief physician of the Department of Infection of Beijing You'an Hospital and a medical expert at Xiaotangshan Fangcang Hospital, once introduced that the BF.
7 variant is the most transmissible subbranch of the domestic Omicron "family", which is more infectious and insidious and difficult to prevent and control
.
To this end, he reminded the public: the virus has become "strong", and it is more necessary to do a good job of protection
.
7 variant is the most transmissible subbranch of the domestic Omicron "family", which is more infectious and insidious and difficult to prevent and control
.
To this end, he reminded the public: the virus has become "strong", and it is more necessary to do a good job of protection
.
How strong is the strain?
It can be detoxified within 1 day of infection and spread in 2 to 3 days
Li Tong once introduced that the main strain of the current round of the epidemic in Beijing is the Omicron BF.
7 subbranch, imported from outside Beijing, which is different
from the current virus species in many cities in China.
Omicron BF.
7 subclade is the abbreviation of BA.
5.
2.
1.
7, which has stronger immune escape ability, shorter incubation period and faster transmission speed than BA.
1, BA.
2 and BA.
5 variants circulating in many places at the beginning of the year
.
"These have led to the fact that the BF.
7 subclade is currently the most contagious in the domestic Omicron 'family', so prevention and control is more
difficult.
"
7 subbranch, imported from outside Beijing, which is different
from the current virus species in many cities in China.
Omicron BF.
7 subclade is the abbreviation of BA.
5.
2.
1.
7, which has stronger immune escape ability, shorter incubation period and faster transmission speed than BA.
1, BA.
2 and BA.
5 variants circulating in many places at the beginning of the year
.
"These have led to the fact that the BF.
7 subclade is currently the most contagious in the domestic Omicron 'family', so prevention and control is more
difficult.
"
"From a clinician's perspective, the Delta variant has an R0 value of 5 to 6, and Omicron has an R0 value of more than 10
.
" Li Tong once introduced that the R0 value is the basic regeneration coefficient, which is an important index
for the spread of infectious diseases.
It refers to the number of
people who can be transmitted on average in an environment where all susceptible people can be transmitted without intervention.
The higher the R0 value, the stronger the transmission capacity of the infectious disease and the faster the number of infected people
.
The current Omicron BF.
7 subbranch in Beijing has an R0 value of 10 to 18.
6
.
.
" Li Tong once introduced that the R0 value is the basic regeneration coefficient, which is an important index
for the spread of infectious diseases.
It refers to the number of
people who can be transmitted on average in an environment where all susceptible people can be transmitted without intervention.
The higher the R0 value, the stronger the transmission capacity of the infectious disease and the faster the number of infected people
.
The current Omicron BF.
7 subbranch in Beijing has an R0 value of 10 to 18.
6
.
Why is the number of new cases and social cases in Beijing continuing to increase? Li Tong once said that the Omicron variant can be detoxified 1 day after infection, and second-generation cases can appear in 2 to 3 days, so according to the previous testing frequency, some people may be missed, and transmission has been caused when it is found positive; From the cases he contacted, although the viral infection has increased and the intergenerational time has become shorter, the time to turn negative after infection is still 7 to 10 days, which has not been shortened
.
.
In addition, Omicron infection generally has mild symptoms and tends to reduce vigilance
.
"Many people are mildly ill and asymptomatic after infection, and if they are not detected in time and still go to work, school, or gathering, it may cause the spread
of the epidemic.
" Li Tong once said that this is why the spread of the epidemic caused by Omicron BF.
7 is very
difficult to prevent and control.
Nucleic acid testing plays an important role
in detecting infected people as early as possible and cutting the transmission chain.
.
"Many people are mildly ill and asymptomatic after infection, and if they are not detected in time and still go to work, school, or gathering, it may cause the spread
of the epidemic.
" Li Tong once said that this is why the spread of the epidemic caused by Omicron BF.
7 is very
difficult to prevent and control.
Nucleic acid testing plays an important role
in detecting infected people as early as possible and cutting the transmission chain.
If the neighbor agrees
Is it feasible for infected people to isolate at home?
Li Tong once introduced that the symptoms caused by the BF.
7 subbranch are similar to other Omicron variants, and the symptoms of the upper respiratory tract are still the main manifestations, patients may have fever, cough, sore throat, loss of smell and taste and other symptoms, a small number of people may appear vomiting, diarrhea and other digestive symptoms, a very small number of people may also have loss of smell and taste
.
7 subbranch are similar to other Omicron variants, and the symptoms of the upper respiratory tract are still the main manifestations, patients may have fever, cough, sore throat, loss of smell and taste and other symptoms, a small number of people may appear vomiting, diarrhea and other digestive symptoms, a very small number of people may also have loss of smell and taste
.
At present, the city adopts different treatment methods
for people infected with new coronary pneumonia at different levels.
For asymptomatic infections, no drugs can be used for the time being, no treatment
.
"But we will distinguish between people at high risk of severe disease, such as the elderly, people with underlying medical conditions and other immunocompromised people, or long-term smokers, obese people, and pregnant women
in the third trimester.
" These people are at higher risk of developing severe cases after infection, and we will monitor
them more closely.
Li Tong once said
.
for people infected with new coronary pneumonia at different levels.
For asymptomatic infections, no drugs can be used for the time being, no treatment
.
"But we will distinguish between people at high risk of severe disease, such as the elderly, people with underlying medical conditions and other immunocompromised people, or long-term smokers, obese people, and pregnant women
in the third trimester.
" These people are at higher risk of developing severe cases after infection, and we will monitor
them more closely.
Li Tong once said
.
For mild and ordinary cases, the city mainly adopts symptomatic treatment in medical treatment
.
"For example, if the patient has fever, cough and other symptoms, we use some antipyretic and analgesic drugs to relieve the patient's uncomfortable symptoms
.
In some mild and common cases, experts assess that there is a greater risk of progression, and we will treat with antiviral drugs
.
”
.
"For example, if the patient has fever, cough and other symptoms, we use some antipyretic and analgesic drugs to relieve the patient's uncomfortable symptoms
.
In some mild and common cases, experts assess that there is a greater risk of progression, and we will treat with antiviral drugs
.
”
If neighbors agree, positive people can be isolated at home without sending a cabin, is this currently feasible?
Li Tong once said that for asymptomatic infected people themselves, most people are willing to observe at home
.
However, as a doctor, I have indeed seen clinically that some elderly people will develop into severe cases or aggravate the original underlying diseases
after infection.
.
However, as a doctor, I have indeed seen clinically that some elderly people will develop into severe cases or aggravate the original underlying diseases
after infection.
Therefore, residents of the same community who have elderly people, sick people, or people who are about to take exams and have important work to be handled may have different views
on this.
"If it can be accurate, 'one policy for one family' and 'one policy for one person' is of course the best
.
But this requires professionals to assess the community environment, home ventilation and drainage conditions, etc.
, to ensure that the surrounding residents are safe
.
The reality is that there are no reliable assessment methods, and many communities fail to do so, and the strategy of centralized isolation is based on the reality of the situation
.
Li Tong once said
.
on this.
"If it can be accurate, 'one policy for one family' and 'one policy for one person' is of course the best
.
But this requires professionals to assess the community environment, home ventilation and drainage conditions, etc.
, to ensure that the surrounding residents are safe
.
The reality is that there are no reliable assessment methods, and many communities fail to do so, and the strategy of centralized isolation is based on the reality of the situation
.
Li Tong once said
.
The virus becomes more contagious
Can ordinary medical surgical masks still be prevented?
The virus has become more contagious, can ordinary medical surgical masks still be prevented?
Li Tong once said that the Omicron BF.
7 variant has indeed become "stronger", and it has "adopted" a strategy
that is more suitable for its own transmission.
The Omicron variant mainly multiplies in the upper respiratory tract, "infected people don't even need to sneeze, when we cough and talk loudly, we may excrete the virus and infect people around us, so we should pay more attention to daily protection
.
" ”
7 variant has indeed become "stronger", and it has "adopted" a strategy
that is more suitable for its own transmission.
The Omicron variant mainly multiplies in the upper respiratory tract, "infected people don't even need to sneeze, when we cough and talk loudly, we may excrete the virus and infect people around us, so we should pay more attention to daily protection
.
" ”
Li Tong once said that when two people talk face-to-face, if they both wear medical surgical masks, the risk of infection will be greatly reduced, so citizens should try to wear masks
scientifically throughout the process when going out.
scientifically throughout the process when going out.
Due to the closeness of the face fit, ordinary medical surgical masks are not as airtight and protective as N95 and KN95 masks
.
When citizens go to places with higher risk levels, such as hospitals, underground supermarkets with poor air circulation, entertainment venues or take public transportation, it is recommended to wear N95 and KN95 masks
with higher protection levels.
.
When citizens go to places with higher risk levels, such as hospitals, underground supermarkets with poor air circulation, entertainment venues or take public transportation, it is recommended to wear N95 and KN95 masks
with higher protection levels.
