Sanxiang Metropolis Daily on January 10 (All-media reporter Li Qi, correspondent Chen Siyu, Yang Zhengqiang, video Gao Yuqi) After mycoplasma pneumonia and influenza A, influenza B has recently attracted public attention. On social platforms, many netizens shared the process of their cold and fever: persistent high fever, muscle and joint soreness all over the body, and continued fatigue after turning negative.
Some netizens compared the symptoms of the flu and said, "Yiliu is the king of kings, and the bones of the whole body hurt." ”
What is the current situation of influenza in Changsha? What is the difference between influenza B and influenza A, and why is it so painful after the flu? On 10 January, this reporter conducted an interview to find out.
On the third day of infection, my ribs hurt when I straightened my chest
"Today is the 3rd day, and I am much better, but I still have soreness all over my body and my ribs hurt. On January 10, citizen Zuo Ying (pseudonym) returned to work and took two days of sick leave, and there was a lot of work waiting for her to handle.
Last weekend, Zuo Ying took her two children back to her hometown of Yiyang to drink happy wine, and after returning to Changsha on Sunday, she always felt very tired and had a terrible headache. In the middle of the night, the person began to have a fever and was sore all over.
Early the next morning, Zuo Ying asked for leave from the unit and fell asleep all morning. At noon, she couldn't stay up, so she went to the Community Health Service Center of Xihu Street, Yuelu District, Changsha City for medical treatment, considering that there were children at home, she did a test strip test to determine that she was infected with influenza B, and then bought some medicine under the advice of the doctor.
"The effect of taking medicine is not very good, and I went to the clinic at the entrance of the community at night to get an intravenous drip. Zuo Ying said that in the past few days, she has also seen some news from Yiliu, and she frankly said that she was deeply touched by netizens' "bones hurt".
Today is the third day of infection, and although the situation is much better, Zuo Ying still feels that her ribs still hurt when she straightens her chest.
There has been no significant increase in the number of cases in hospitals
According to the latest issue of the "Influenza Surveillance Weekly Report" (December 25-31, 2023) released by the National Influenza Center on January 4, the proportion of influenza A H3N2 strains that previously dominated transmission has decreased significantly, and the proportion of influenza B strains has increased significantly, with influenza B accounting for 26.4% in the south and 47.3% in the north.
What is the situation in Changsha? This reporter visited a number of medical institutions in Changsha.
In the Community Health Service Center of Wangyue Street, Yuelu District, Changsha City, there have been flu patients who have come to see a doctor, and most of the symptoms are fever and cough, and there are relatively few symptoms of unbearable body aches. "Not everyone will be tested, so there is no specific statistical data. According to the staff of the center, there are fewer influenza patients recently than before, and the peak of this wave of influenza has begun to stabilize, and there is no obvious trend of increasing the number of patients with influenza B at present.
The situation in Hunan Aerospace Hospital is similar, with a few cases of influenza B, but there is no significant increase. "Many people around me have cough and other symptoms, most of which are respiratory diseases, mainly influenza A or B, and a small number of adenovirus, as well as respiratory syncytial virus and Mycoplasma pneumoniae infection. Li Shenglu, deputy director and chief physician of the General Outpatient Department of Hunan Chest Hospital, said.
One fever, two pains and three deficiencies, there is no obvious difference in the symptoms of A and B
Influenza viruses can be divided into three types: A, B, and C. Both influenza A and B viruses are highly contagious and seasonally endemic. Among them, influenza B is an influenza caused by influenza B (B) virus, and its incubation period is mostly 1-4 days.
The incidence of influenza B is high, and the winter and spring of the mainland every year is the high incidence season, which is mainly transmitted through droplets such as sneezing and coughing of the patient, and can also be transmitted through contact with the mucous membranes of the patient's mouth, nasal cavity, eyes and other mucous membranes. Infection can also be caused by contact with items contaminated with the virus.
The entire population is generally susceptible, and pregnant women, infants, the elderly, and patients with chronic diseases are at high risk of severe disease.
What is the difference between influenza B and influenza A? Li Shenglu said that in terms of the group of patients who come to the clinic, there is no significant difference in the symptoms caused by influenza A and influenza B, and there is no significant difference in the proportion of intensive care units.
"Influenza A and influenza B are both acute onset, will suddenly appear chills, high fever, sore throat, cough, muscle aches and other symptoms, body temperature can reach a peak within a few hours to 24 hours, reaching 39-40 °C or even higher, simply summarized as 'one fever' (fever), 'two pain' (muscle aches), 'three deficiency' (general fatigue). ”
It hurts more when you are infected with a bone, and you may feel pain after a cold
"In fact, whether it is the previous new crown, or influenza A and influenza B, some patients have bone pain. Li Shenglu said that upper respiratory tract infectious diseases caused by rhinovirus, adenovirus, influenza virus and other pathogenic bacterial infections can cause body aches and fatigue.
When pathogenic bacteria enter the body, they will destroy immunity and release inflammatory mediators, such as prostacyclin, which will spread throughout the body with blood circulation. When used as a bone application, it can cause bone pain. In addition, pathogenic bacteria can cause skeletal muscle spasms and contractions, and if sensory nerves are stimulated, some patients will also experience bone pain.
On some social platforms, many netizens pointed out that "the course of this infection is longer than that of the previous influenza A infection" and "the symptoms are also more severe", will the symptoms of influenza B really be worse than that of influenza A? In this regard, Li Shenglu explained that most of the symptoms of influenza B patients are relatively milder than those of influenza A patients, but some patients with influenza B have more obvious symptoms in the gastrointestinal tract, and the overall course of the disease after the two infections is similar, mostly in 5-7 days.
"In general, influenza A is more transmissible and spreads faster than influenza B, and influenza B has a low probability of outbreak and spreads relatively slowly. Therefore, whether it is influenza A or influenza B, the means of prevention and treatment are similar.
Will I be reinfected if I have a cold recently? The same subtype has some immunity
Li Shenglu said that this is possible, in the season when the flu virus is circulating, it has different virus strains, for example, there are influenza A and influenza B, both of which have different subtypes, and if citizens are infected with one subtype before and then infect another subtype, it will lead to the possibility of reinfection. However, for the same subtype, there will be a certain immunity after infection, and the subtype will not be reinfected within 3-6 months.
"Recently, as the end of the semester approaches, the pressure on the student group will be relatively high, and many of the children who come to the clinic are mainly primary and secondary school students, and the infant group is relatively small. The main reason is that the classrooms where primary and secondary school students live are densely populated and the environment is relatively closed, and the possibility of cross-infection of the virus is greater. Li Shenglu reminded.
Although the proportion of influenza B has increased, it is not a large-scale outbreak, and through scientific prevention and timely treatment, the symptoms can be effectively improved. During the winter vacation, parents should guide them to avoid going to crowded places, keep indoor ventilation, wash hands frequently, and cultivate good personal hygiene habits.
At the same time, once symptoms such as fever appear, seek medical attention in time and follow the doctor's advice to ensure that the condition is controlled in a timely and effective manner.