Coming "tridemia": risk of infection with three respiratory viruses – influenza, covid and RSV

As epidemiological experts insist, the flu vaccine in 2022 is more needed than in other years, due to the risk of “tridemic” (a combination of flu, covid and RSV in the cold season).

The flu vaccine is provided free of charge by prescription funds. Vulnerable populations are strongly recommended to be vaccinated. Especially this year, experts advise us to get vaccinated, even if we have not done so in other years, in order to eliminate the risk of “tridemia” (infection with three respiratory viruses).

RSV (orthopneumovirus) may pose a risk to everyone since no vaccine exists, but children under 5 years of age, especially infants under 1 year of age, and adults over 65 years of age are at greatest risk. Symptoms are much the same as those of the flu and include a runny nose, decreased appetite, coughing, sneezing, fever, and wheezing (“wheezing”). At the same time, young infants may only have decreased activity, irritability and breathing problems.

The symptoms of influenza, SARS-CoV-2, and RSV may overlap. But each can cause breathing problems that could land vulnerable populations in the hospital.

Side effects from the flu shot may appear within one to two days after vaccination:

  • Pain.
  • Redness.
  • Itching.
  • Swelling at the injection site.
  • Fatigue (loss of energy).
  • Muscle pain.
  • Decreased body temperature.

Usually the symptoms are mild and disappear within a few days, without the need for any treatment. The flu vaccine is safe for pregnant women and fetuses at any stage of pregnancy, and is recommended by doctors. It is safe to get flu shots for people who are allergic to eggs. People with a history of severe allergic reactions (anaphylaxis) to eggs should be vaccinated against influenza in a healthcare facility with staff experienced in recognizing and treating anaphylaxis.

If you have ever had any of the following, talk to your doctor before getting a flu shot:

  1. a severe allergic reaction after a previous vaccination with an influenza vaccine,
  2. severe allergic reaction to any component of the flu vaccine.



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