Why is this year’s flu vaccine coming so early?

According to the information released by the National Influenza Center, the positive rate of influenza virus detection in southern provinces continued to rise in June, and some provinces entered a period of high incidence in summer, dominated by A(H3N2) subtype influenza viruses.

Influenza viruses are divided into four types: A, B, C, and D. At present, the main infecting people are the A (H1N1) and A (H3N2) subtypes in the influenza A virus and the B (Victoria) and B in the influenza B virus. (Yamagata) system, commonly known as “A stream” and “B stream”.

Influenza usually peaks in winter and spring, but this year’s influenza outbreaks began to appear from south to north in summer. Compared with previous years, this year’s wave of influenza has a very strong momentum, which is the main reason why the influenza vaccine is “in place ahead of schedule”.

“flu” ≠ “Heavy cold”

Cold and flu look the same at first glance, but are caused by different viruses and have different symptoms?

But in fact, it’s not. Symptoms of the common cold are generally sneezing, nasal congestion, runny nose, cough, and sore throat. It may be caused by respiratory syncytial virus, rhinovirus, adenovirus, coronavirus, etc., and it usually heals on its own within a week.

Influenza is an acute respiratory infectious disease caused by influenza virus. Compared with the common cold, influenza has more severe systemic symptoms. The main symptoms are high fever, headache, sore throat, and muscle aches.

Therefore, neither in terms of infectivity nor lethality are on the same level. “Among the patients diagnosed in the past, it is not uncommon for a family to be recruited from parent to child, or from child to parent, and it is not uncommon for a family to be recruited. Sometimes the child recovers and the adult falls again.” Jin Jie introduced .

Not only that, relevant data show that there are about 3 to 5 million severe influenza cases worldwide each year, and the mortality rate of severe influenza cases is about 10%. In other words, almost one in 10 severe flu patients will die.

In these cases, take it to the hospital

In most uncomplicated flu patients, symptoms resolve within 3 to 7 days, but recovery of cough and physical strength often takes 1 to 2 weeks.

If you have a fever, and it lasts for 3 days or more, with headache, muscle aches, chills, poor mental state, and poor appetite, you should see a doctor as soon as possible to avoid delaying your illness.

In addition, the doctor reminds that even if there is no fever, the following three conditions should be rushed to the hospital:

1. Severe coughing, rapid breathing, or difficulty breathing;

2. Severe vomiting;

3. Depressed or unwilling to communicate, lethargic, or crying and restless, convulsions.