Dr. Vaccines
Common Viruses in India
What actually circulates here, which infections a vaccine prevents, and which need mosquito control or water safety instead.
Book an appointmentIndia's viral disease pattern is shaped by three things: a monsoon that drives mosquito breeding, water and sanitation that vary enormously between and within cities, and population density that makes respiratory spread efficient.
The practical consequence is that the highest-profile infections here are often the ones without a routine vaccine. Dengue dominates the monsoon season and has no routinely available vaccine, while typhoid and hepatitis A, which are preventable, are frequently treated as unavoidable.
Viruses and infections that circulate in India
| Infection | How it spreads | Vaccine | Notes |
|---|---|---|---|
| Dengue | Aedes mosquito, daytime biting | No vaccine | Peaks after the monsoon across most of India. Four serotypes circulate, and a second infection with a different serotype carries a higher risk of severe dengue. No routinely available vaccine here, so bite avoidance and eliminating standing water are the protection. |
| Chikungunya | Aedes mosquito | No vaccine | Similar transmission to dengue and often circulating alongside it. Joint pain can persist for months after the fever resolves, which is the feature patients find hardest. |
| Hepatitis A | Contaminated food and water | Preventable | Vaccine-preventable. Improving sanitation has shifted infection from mild childhood cases to more severe adult ones, so adult susceptibility is rising. |
| Hepatitis E | Contaminated water | No vaccine | Outbreaks follow flooding and monsoon contamination. Particularly dangerous in pregnancy, with substantially higher mortality. A vaccine exists but is not routinely available in India. |
| Influenza | Respiratory droplets | Preventable | Vaccine-preventable, with seasonality tied to the monsoon in much of the country rather than to a northern-hemisphere winter. |
| Rabies | Animal bite, mostly dogs | Preventable | India carries a large share of global rabies deaths. Vaccine-preventable both before exposure and, critically, after a bite if treatment starts promptly. |
| Japanese encephalitis | Culex mosquito, rural areas | Preventable | Vaccine-preventable and included in the national schedule in endemic districts, mostly linked to rice cultivation and pig rearing. |
| Measles | Airborne, extremely contagious | Preventable | Vaccine-preventable. Outbreaks still occur in pockets of low coverage, and adults with incomplete childhood vaccination remain susceptible. |
| Rotavirus | Faecal-oral | Preventable | A leading cause of severe infant diarrhoea. Vaccine-preventable and now part of the national immunisation programme. |
| Hepatitis B | Blood, sexual contact, mother to child | Preventable | Vaccine-preventable. Many adults born before it entered the routine schedule were never vaccinated, and infection can stay silent for decades. |
What to arrange before you travel
- For visitors to India, hepatitis A and typhoid vaccination are the usual starting point, with hepatitis B for longer stays.
- Rabies pre-exposure vaccination is worth considering for extended stays, rural travel, cycling or anyone working with animals.
- Mosquito bite avoidance matters as much as any vaccine, because dengue and chikungunya have no routine vaccine cover.
- Japanese encephalitis vaccination is considered for extended rural stays during transmission season.
Frequently asked questions
Which viruses are most common in India?
Dengue and chikungunya dominate the post-monsoon season, hepatitis A and E circulate through water and food, and influenza, measles, rotavirus, hepatitis B and rabies remain significant. Several of these are vaccine-preventable; dengue, chikungunya and hepatitis E are not, in routine practice here.
Is there a dengue vaccine available in India?
Not in routine practice. Dengue prevention depends on avoiding mosquito bites and eliminating standing water around the home. This is one of the most common misunderstandings we encounter.
Why is hepatitis A becoming more of an adult problem in India?
As sanitation improves, fewer children are exposed early, when the infection is usually mild. Those children reach adulthood without immunity, and hepatitis A in adults is a considerably more severe illness. Vaccination closes that gap.
Which vaccines should an Indian family prioritise?
Beyond the national childhood schedule, typhoid conjugate and hepatitis A are worth adding, with annual influenza for the household and pneumococcal plus shingles for grandparents. Rabies pre-exposure is worth discussing if there are street animals nearby.
Book a vaccination consultation
Several of the infections on this page are preventable, and most Indian adults are missing at least one of those vaccines. Our doctors will work through your history and tell you what is actually outstanding.
Book an appointment