Recently, the flu has been high in many places in Guangdong.
January 3rd
The topic of "A stream just attracts B stream"
Chong chong re sou
Some netizens are confused.
Both influenza A and influenza B belong to influenza.
There are antibodies in the body after being infected with swine flu.
How can you still be infected with B stream?
Some netizens reported that
I do have it myself.
The experience of being infected with influenza A and B successively.
Why does it appear?
Repeated infection with influenza A and B?
Is there a high probability of repeated infection?
What is the difference between B-stream and A-stream?
How to protect?
……
In view of the above problems
Southern Hospital of Southern Medical University
Peng Jie, Director of Difficult Infection Treatment Center
Sun Yixian Memorial Hospital of Sun Yat-sen University
Yang Zhengfei, Deputy Director and Chief Physician of Emergency Department
Give an answer
The number of children’s emergency treatment decreased, while that of adults increased.
ask
Recently, what is the situation of respiratory diseases in hospitals?
answer
Peng Shu: Winter is the season of high incidence of respiratory diseases. Recently, the number of outpatients with fever has nearly tripled compared with before. Most of the patients are infected with influenza virus. Although the number of patients with B-stream has increased, most of them are still patients with A-stream.
Yang Zhengfei: According to the situation in the North Campus where I am located, the number of daily visits to fever clinics has gradually increased compared with the same period or previous months, but the number of emergency departments for children has declined and the number of emergency departments for adults has increased. But on the whole, it is basically the same as before the epidemic, and the public does not need to panic.
The main epidemic pathogens are influenza virus and mycoplasma pneumoniae, and there are also some common pathogens that cause common colds, such as rhinovirus and respiratory syncytial virus.
ask
What are the symptoms and characteristics of influenza patients? What is the difference between symptoms of A stream and B stream?
answer
Peng Cong: The patient has symptoms of acute upper respiratory infection such as fever, cough and sore throat, and symptoms of systemic poisoning such as headache and muscle aches. However, the condition of most patients is not serious, and there are not a large number of seriously ill patients, which has not increased compared with before, so the public need not panic.
Both A-stream and B-stream show symptoms of acute upper respiratory tract infection and systemic poisoning, so they cannot be distinguished by symptoms. However, compared with B-stream, the symptoms of A-stream will be heavier and more contagious, and patients will continue to have fever for a longer time. However, there are still differences in symptoms among individuals, so it is recommended that patients be tested and treated in time.
ask
Why does B-flow fluctuate and rise?
answer
Peng Zhen: Both influenza A virus and influenza B virus will appear in the crowd. Assuming that some people are infected with influenza A, the risk of infection with influenza B will be relatively reduced.
However, assuming that a person has not been infected with influenza A or B recently, after influenza B becomes the dominant virus strain, it may be infected with influenza B..
It is unlikely to be infected with influenza A and B in a short period of time.
ask
Is there a high probability of being infected with influenza A and B successively?
answer
Peng Zhen: Generally speaking, the probability of being infected with influenza A and B in a short period of time is very small. Because the immunity to the same kind of virus strain is very strong, the antibody maintenance time is about 3-6 months, but although there is partial cross immunity to different virus strains, it is still not strong enough, and the influenza virus is constantly mutating, so there is still the risk of reinfection during this period. In addition, whether the virus is infected or not is affected by various factors, such as individual immunity, the number of infected viruses, the virulence of virus strains and so on.
For healthy people, it is unlikely that they will be infected with influenza A and B in a short period of time. However, for people with weak resistance and insufficient immunity to prevent the infection of the next virus strain, theoretically, there may be cases in which two viruses are infected successively.
Yang Zhengfei: There are many types of influenza. We found that patients infected with influenza A will produce certain antibodies, but this antibody may weaken the preventive effect of influenza B virus, which is not enough to cover new virus infections, and there may be "virus escape", but this situation is rare.
No matter what kind of virus the patient is infected with, if he doesn’t have a good rest, drink plenty of water and supplement enough nutrition, his body is not well conditioned, and it is easy to merge or infect other pathogens again.
ask
Are there any recurrent infections?
answer
Peng Shu: I met some young people with low immune function or overworked recently in the outpatient department. Some time ago, they were infected with mycoplasma pneumoniae, and during this time, they were infected with the flu, which means "repeated infection". But I have never met a patient who has been infected with influenza A and B in a short period of time.
Yang Zhengfei: Influenza A virus and influenza B virus belong to the same genus, and basically will not be co-infected at the same time. We encounter more virus mixed bacteria or mycoplasma infection. For example, patients were infected with swine flu first, and their immunity decreased, and then pneumonia appeared. The pathogen that causes this pneumonia may not be a virus, but mycoplasma pneumoniae, streptococcus pneumoniae and even chlamydia.
Reduce unnecessary "vaccine hesitation"
ask
Do I need to take oseltamivir as soon as I am infected with influenza virus?
answer
Yang Zhengfei: For healthy adults with no basic diseases, symptomatic treatment is enough. Taking antiviral drugs within 24-48 hours after symptoms appear, such as oseltamivir and mashalovir, can effectively shorten the course of disease and reduce the probability of becoming severe. In addition, patients must rest well and avoid staying up late and doing high-intensity exercise. At the same time, drink plenty of water and supplement vitamins and nutrition.
For people with basic diseases and low immunity and the elderly, antiviral drugs should be taken in time to block the damage to lungs, hearts and other organs that may occur due to the continuous replication of the virus. However, if you have a persistent high fever of 39℃, your body temperature will not drop for two or three days, or you have symptoms such as dyspnea, you must come to the hospital in time.
However, if it is a common cold, the patient is weak. Therefore, it is suggested that patients should not blindly come to the hospital to see a doctor. Not only will they not get a good rest, but they will also increase the probability of cross-infection, which is not conducive to the recovery of the body.
ask
What kind of flu protection awareness should the public establish?
answer
Peng Qi: Although the flu is a self-limiting disease, it is not a cold. Don’t take chances. I appeal to the public to reduce unnecessary "vaccine hesitation". At present, the most economical and effective measure to prevent influenza is to vaccinate against influenza. Therefore, it is suggested that people who have not been infected with influenza virus, especially those with low immune function, the elderly with basic diseases and high-risk people, should be vaccinated as soon as possible.
Yang Zhengfei: If you have a cold or fever, don’t go to public places, classes or work unless necessary. If you have to go, it is recommended to wear a mask and pay attention to the etiquette of coughing and sneezing to avoid cross-infection.
For people who are not infected with the virus, it is not necessary to wear a mask if they are healthy, have no basic diseases and do not go to crowded places. For the elderly over 65 years old, people with basic diseases and people with low immunity, whether they are infected with the virus or not, they must wear masks and wash their hands frequently in crowded places.
ask
Can patients buy influenza detection reagents to test themselves?
answer
Peng Qi: Different detection methods produce different results. The sensitivity of some antigens is not high, and there may be "false negative" or "false positive". If the symptoms are serious, it is recommended that patients go to the hospital for regular testing, and it is best to do influenza nucleic acid testing if conditions permit.
News
Original title: "A stream just recruited B stream? Expert response → "
Read the original text