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What Vaccinations Should You Get After Flood Exposure?

Last updated October 25, 2026

The short answer

Why Tetanus Matters

Floodwater often contains debris, soil, and bacteria that can enter your body through cuts or scrapes. A tetanus shot protects against a serious bacterial infection that can be life-threatening. If your last tetanus booster was more than ten years ago, you may need a booster.

The pros who handle flood cleanup routinely check their own vaccination status before starting work. For you, the same logic applies. If you have any open wound and you have been in floodwater, see a doctor quickly. They can tell you if a booster is needed based on your medical history.

Hepatitis a and B Basics

Hepatitis A spreads through contaminated food or water, which flood conditions can make more likely. Hepatitis B spreads through blood or bodily fluids, and it can be a risk if you come into contact with contaminated items. Vaccines exist for both, but whether you need them depends on your exposure and your routine immunization schedule.

If you are unsure about your vaccination history, a doctor can run a simple blood test to check your immunity. They can then recommend the appropriate shots. For most people, hepatitis A and B vaccines are part of routine childhood immunizations, but boosters may be recommended in certain situations.

Policies vary, and your insurer decides what is covered. Check your policy to see what vaccinations are included, and ask your doctor about costs before getting any shots.

  • Hepatitis A vaccine is given in two doses, six months apart.
  • Hepatitis B vaccine is often three doses over several months.
  • Combined hepatitis A and B vaccines are available.
  • Your doctor can test for antibodies to confirm immunity.
  • Flood exposure alone may not require hepatitis shots if you are already vaccinated.

What About Tetanus Boosters

A tetanus booster is recommended every ten years. If you received a booster within that window, you likely do not need another one. However, if the wound is deep or contaminated, a doctor may suggest a booster even if it has been less than ten years.

The key is to act quickly after exposure. Delaying a tetanus shot reduces its effectiveness. See a doctor within a few days of any puncture wound or cut that came into contact with floodwater. They will assess the wound and your immunization record.

Other Vaccines to Consider

Depending on your age and health, other vaccines might be relevant. For example, a flu shot is generally a good idea, but it is not specific to flood exposure. Pneumococcal and shingles vaccines are recommended for older adults, but they do not relate directly to flood risks.

If you have chronic health conditions, talk to your doctor about any additional immunizations. The goal is to keep your immune system strong while you handle cleanup and drying tasks. Your doctor is the right source for personalized advice based on your medical history and local disease patterns.

Steps After Floodwater Contact

First, wash any cuts or scrapes thoroughly with soap and clean water. Apply an antiseptic and cover the wound with a bandage. Then, contact your doctor to discuss tetanus and other vaccines. If you have symptoms like fever, nausea, or diarrhea, seek medical attention promptly.

Keep a record of any vaccinations you receive. This helps you stay on schedule in the future. If you live in Long Island, your local health department can provide guidance on recommended immunizations after a flood. They can also point you to low-cost vaccine clinics if you need them.

  • Clean all wounds with soap and water immediately.
  • Apply antiseptic ointment and cover with a sterile bandage.
  • Check your vaccination records for tetanus status.
  • Call your doctor within a few days of exposure.
  • Monitor for signs of infection like redness or swelling.
  • Keep a written record of any shots you get.

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Frequently asked questions

How soon after flood exposure should I get a tetanus booster?

Get a booster as soon as possible if your last one was over ten years ago. For deep or dirty wounds, a doctor may recommend a booster even if it has been less than ten years. Do not wait more than a few days.

Can I get hepatitis from floodwater?

Hepatitis A can spread through contaminated water, so it is a possible risk. Hepatitis B is less likely from floodwater alone. Your doctor can assess your exposure and recommend vaccines if needed. Most people are already vaccinated.

Are there any vaccines I should avoid after a flood?

Avoid live vaccines if you have a weakened immune system, but that is rare. In general, follow your doctor's advice. Do not get unnecessary vaccines, but do not skip recommended ones either. Your medical history matters most.

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