Delhi is witnessing a sharp surge in H1N1 influenza cases this season, with 1,344 infections reported compared with 229 during the same period last year. The nearly six-fold increase is not just a statistical
spike; it signals that influenza is circulating widely across the National Capital Region.
With cases climbing, many people are wondering whether they should get a flu shot now, particularly if they have never taken one before.
Dr Vandana Garg, Director – Internal Medicine, Max Super Speciality Hospital, Vaishali, Ghaziabad, says vaccination can be an important preventive measure, but the decision should be based on individual risk rather than panic over rising case numbers.
“As some regions of Delhi are experiencing a rise in influenza cases, queries regarding H1N1 vaccination have become common,” Dr Garg says.
“One should not go for vaccination just because he or she has seen it on the news. Vaccination should be done based on individual risk,” she adds.
Does The Flu Vaccine Protect Against H1N1?
H1N1 is a subtype of influenza A. While infection can be mild in many people, it can lead to serious complications, particularly among those at higher risk.
Seasonal flu vaccines are formulated to protect against influenza strains expected to circulate during a particular season and may include protection against the H1N1 strain.
Importantly, the flu vaccine does not cause influenza. Dr Garg explains that it takes around two weeks after vaccination for the body to develop an immune response, so protection is not immediate.
Who Should Get A Flu Shot?
Vaccination is particularly important for people who have a higher risk of developing complications from influenza.
According to Dr Garg, priority groups include older adults, young children, pregnant women and healthcare professionals, as well as people with underlying health conditions such as asthma, chronic lung disease, diabetes and heart disease. Those with weakened immunity may also benefit from vaccination.
If you belong to a high-risk group, speak to your doctor about whether you should get vaccinated and which vaccine is appropriate for you.
Got A Flu Shot Last Year? Do You Need Another?
Yes, flu vaccination is not generally a once-in-a-lifetime shot.
“There is a widespread belief that getting the flu vaccine once means you will be protected for the rest of your life,” Dr Garg says. However, immunity may decline over time, and the influenza viruses circulating in the community can change.
Flu vaccines are therefore updated regularly to target the strains expected to circulate, which is why annual vaccination is generally advised.
Should You Get Vaccinated Now That Cases Are Rising?
A surge in cases does not necessarily mean everyone should rush to get vaccinated without medical guidance. Your age, health conditions, pregnancy status, previous vaccination and individual risk can all influence the decision.
Those at higher risk should consult their doctor about the appropriate vaccine and timing. And because protection takes roughly two weeks to develop, a flu shot should be viewed as a preventive measure rather than a treatment for an existing infection.
Can You Still Get H1N1 After Vaccination?
Vaccination does not guarantee that you will never catch influenza. However, it is designed to reduce the risk of infection and, importantly, can help protect against severe disease and complications.
That is also why vaccination shouldn’t replace everyday precautions during periods of increased flu transmission.
What Else Can You Do To Protect Yourself?
“Vaccination should be viewed as only one method of fighting the virus,” says Dr Garg.
Maintaining good hand hygiene, improving ventilation by opening windows where appropriate, staying home when unwell and wearing a mask in crowded places can help reduce exposure and transmission during flu season.
People experiencing persistent high fever, difficulty breathing, chest pain, confusion or severe tiredness should seek medical attention promptly rather than attempting to manage worsening symptoms at home.
