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Understanding Flu Vaccines for Adults

Know about flu vaccines, who, where, and when to get vaccinated, know the types, facts and useful tips to build your immune system stronger and more.

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Written by Dr. D Bhanu Prakash

Reviewed by Dr. Siri Nallapu MBBS

Last updated on 30th Jul, 2025

Introduction

Getting the flu (influenza) can be a miserable experience. Fever, body aches, fatigue, and a sore throat can leave you feeling weak for days. For some, especially older adults or those with chronic illnesses, the flu can lead to serious complications like pneumonia. The good part is Flu vaccines can significantly reduce your risk of getting sick and help protect those around you.

If you’ve ever wondered whether you should get a flu shot, how it works, or if it’s safe, this guide will answer all your questions in simple, easy-to-understand terms.

What Is a Flu Vaccine?

A flu vaccine is a preventive shot that helps your immune system fight off the influenza virus. Every year, scientists update the vaccine to match the most common flu strains expected to circulate.

Consult Top Specialists for Personalised Tips

Dr. Bhukya Pavan Kalyan, General Physician

Dr. Bhukya Pavan Kalyan

General Physician

5 Years • MBBS DNB Paediatrics

Bengaluru

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Dr Syed Mateen Pasha, General Physician

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Types of Flu Vaccines for Adults:

1. Standard-dose flu shot – Recommended for most adults.

2. High-dose flu shot – Designed for adults 65+ for stronger protection.

3. Adjuvanted flu shot – Contains an extra ingredient to boost immunity in older adults.

4. Nasal spray(live attenuated vaccine) – A needle-free option, but not for everyone (avoid if pregnant or immunocompromised).

Why Should Adults Get a Flu Vaccine?

1. Prevents Severe Illness – Reduces the risk of hospitalization.

2. Protects Vulnerable People – Helps shield babies, elderly, and those with weak immune systems.

3. Saves Time & Money – Fewer sick days and medical bills.

4. Reduces Flu Complications – Lowers the risk of pneumonia or worsening chronic conditions like asthma or diabetes.

Who Should Get Vaccinated?

The CDC recommends that everyone aged 6 months and older get a flu shot each year, especially:

  • Adults over 50

  • Pregnant women

  • People with chronic illnesses (diabetes, heart disease, asthma)

  • Healthcare workers

  • Caregivers of high-risk individuals

Common Myths About Flu Vaccines

Some common myths and facts about flu vaccines include:

  • Myth: "The flu shot gives you the flu."

  • Fact: The vaccine contains inactive virus particles and it cannot cause the flu. Mild side effects (like a sore arm or low fever) are normal and mean your body is building immunity.

  • Myth: "I don’t need it every year."

  • Fact: Flu viruses change, and immunity fades so yearly vaccination ensures the best protection.

  • Myth: "Healthy people don’t need a flu shot."

  • Fact: Even healthy adults can get severe flu or spread it to others.

When Should You Get Vaccinated?

The best time is before the flu season starts, usually September–October.  However, getting vaccinated later even in winter is still beneficial.

Possible Side Effects

Most people have mild reactions, such as:

  •  Soreness at the injection site

  •  Low-grade fever

  •  Mild fatigue

These usually go away in 1–2 days. Serious allergic reactions are very rare.

Tips for a Stronger Immune System

While the flu shot is your best defense, these habits help too:

  • Wash hands frequently with soap and water.

  • Eat a balanced diet (vitamin C, zinc, and probiotics help immunity).

  • Stay hydrated and get enough sleep.

  • Avoid close contact with sick people.

Where Can You Get a Flu Shot?

You can get vaccinated at:

  • Local pharmacies

  • Clinics

  • Workplace flu shot programs

Apollo24|7 – Book a consultation or schedule a flu vaccine easily online!

Final Thoughts

Getting a flu vaccine is a quick, safe, and effective way to protect yourself and your loved ones. Know clearly about what are the available vaccinations, who should get it and where to get it. If you haven’t gotten yours yet, now is the perfect time!

Consult a top general practitioner for the best advice

Dr. Bhukya Pavan Kalyan, General Physician

Dr. Bhukya Pavan Kalyan

General Physician

5 Years • MBBS DNB Paediatrics

Bengaluru

PRESTIGE SHANTHINIKETAN - SOCIETY CLINIC, Bengaluru

650

98 Cashback

Dr. Anand Ravi, General Physician

Dr. Anand Ravi

General Physician

2 Years • MBBS

Bengaluru

PRESTIGE SHANTHINIKETAN - SOCIETY CLINIC, Bengaluru

400

60 Cashback

Dr Syed Mateen Pasha, General Physician

Dr Syed Mateen Pasha

General Physician

2 Years • MBBS

Bengaluru

PRESTIGE SHANTHINIKETAN - SOCIETY CLINIC, Bengaluru

400

60 Cashback

Consult Top Specialists for Personalised Tips

Dr Suseela, General Physician

Dr Suseela

General Physician

5 Years • MBBS

Bengaluru

Apollo Medical Center, Marathahalli, Bengaluru

500

50 Cashback

Dr. Bhukya Pavan Kalyan, General Physician

Dr. Bhukya Pavan Kalyan

General Physician

5 Years • MBBS DNB Paediatrics

Bengaluru

PRESTIGE SHANTHINIKETAN - SOCIETY CLINIC, Bengaluru

650

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Dr. Gunashree V L, General Physician/ Internal Medicine Specialist

Dr. Gunashree V L

General Physician/ Internal Medicine Specialist

3 Years • MBBS

Bengaluru

Apollo Clinic, JP nagar, Bengaluru

450

68 Cashback

Dr. Anand Ravi, General Physician

Dr. Anand Ravi

General Physician

2 Years • MBBS

Bengaluru

PRESTIGE SHANTHINIKETAN - SOCIETY CLINIC, Bengaluru

400

60 Cashback

Dr Syed Mateen Pasha, General Physician

Dr Syed Mateen Pasha

General Physician

2 Years • MBBS

Bengaluru

PRESTIGE SHANTHINIKETAN - SOCIETY CLINIC, Bengaluru

400

60 Cashback

Consult a top general practitioner for the best advice

Dr Suseela, General Physician

Dr Suseela

General Physician

5 Years • MBBS

Bengaluru

Apollo Medical Center, Marathahalli, Bengaluru

500

50 Cashback

Dr. Bhukya Pavan Kalyan, General Physician

Dr. Bhukya Pavan Kalyan

General Physician

5 Years • MBBS DNB Paediatrics

Bengaluru

PRESTIGE SHANTHINIKETAN - SOCIETY CLINIC, Bengaluru

650

98 Cashback

Dr. Gunashree V L, General Physician/ Internal Medicine Specialist

Dr. Gunashree V L

General Physician/ Internal Medicine Specialist

3 Years • MBBS

Bengaluru

Apollo Clinic, JP nagar, Bengaluru

450

68 Cashback

Dr. Anand Ravi, General Physician

Dr. Anand Ravi

General Physician

2 Years • MBBS

Bengaluru

PRESTIGE SHANTHINIKETAN - SOCIETY CLINIC, Bengaluru

400

60 Cashback

Dr Syed Mateen Pasha, General Physician

Dr Syed Mateen Pasha

General Physician

2 Years • MBBS

Bengaluru

PRESTIGE SHANTHINIKETAN - SOCIETY CLINIC, Bengaluru

400

60 Cashback

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