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Delhi is witnessing a surge in seasonal influenza cases, with doctors reporting more intense and prolonged symptoms. As the city grapples with changing seasons, health experts emphasize the importance of timely flu vaccinations to mitigate the risk of severe complications like pneumonia and respiratory distress.
Optimal Timing for Flu Shots
The effectiveness of the flu shot hinges on its timing. It takes approximately two weeks for the body to develop immunity post-vaccination. Therefore, it’s crucial to get vaccinated just before the onset of the flu season. In India, seasonal influenza typically peaks twice annually: between January and March, and following the monsoon season.
Dr. Suranjit Chatterjee, Senior Consultant, Internal Medicine at Indraprastha Apollo Hospital, New Delhi, advises individuals to get vaccinated in October, prior to the winter season. “October is when the updated flu vaccine becomes available in the market. A flu vaccine that incorporates strains currently in circulation is likely to be more effective,” he stated.
Who Should Prioritize Vaccination?
While annual flu shots are recommended for everyone, certain groups are at higher risk and should prioritize vaccination. These include:
- Adults aged 65 and above.
- Children under five years old.
- Individuals with chronic conditions like diabetes, heart disease, kidney disease, asthma, and bronchitis.
- Transplant recipients and those on immunosuppressants.
- Individuals with weakened immune systems.
Vaccine Effectiveness and Strain Variation
It’s important to note that the flu vaccine may not completely prevent infection, but it significantly reduces the risk of severe illness and hospitalization. The World Health Organization (WHO) reports that the efficacy of trivalent flu vaccines, containing two influenza A strains and one influenza B strain, is approximately 59% based on pooled results from randomized control trials.
The flu virus’s constant mutation necessitates annual updates to the vaccine. The WHO recommends specific strains for inclusion in the vaccine based on global surveillance data. These recommendations differ for the northern and southern hemispheres. India, being a tropical country, follows the southern hemisphere’s recommendations. A mismatch between circulating strains and the vaccine’s strains can diminish its effectiveness.
Disclaimer:
This article provides general information and should not be considered medical advice. It is essential to consult with a healthcare professional for personalized recommendations regarding flu vaccinations and any health concerns. The effectiveness of flu vaccines can vary, and vaccination does not guarantee complete protection against influenza.(https://indianexpress.com/article/health-wellness/flu-shot-take-when-timing-effective-9898108/)
