Health Topics

Find information on many health topics, listed A to Z.

Infectious Diseases

Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful, but some organisms under certain conditions may cause disease.

In The News

Upper respiratory infection self-care tips

Learn who is at increased risk, and get resources to manage symptoms at home.

November 17, 2022
COVID-19 testing volume increase expected

La Crosse testing doubled on Monday, Dec. 27. Getting vaccinated and wearing a mask in public are key to reducing infection rates.

December 28, 2021

From The Blog

What should you do if you have COVID-19 or flu?

Unsure if you have flu or COVID-19? Symptoms can be similar. Find out what to do, and how to self-manage symptoms and use the Check Symptoms tool.

Muhanad Mohamed, M.D. By Muhanad Mohamed January 30, 2023

9 common questions about vaccines and travel

Planning a trip overseas can be exciting. Learn why you should schedule an appointment with a travel medicine specialist to get the vaccinations and information you need to be healthy and safe on your journey.

Bharath Raj Varatharaj Palraj MD By Bharath Raj Varatharaj Palraj January 3, 2023

Check Symptoms tool evaluates upper respiratory illnesses

Concerned you or your child may have RSV, the flu or COVID-19? Learn how an online assessment tool can quickly evaluate symptoms, determine if testing is needed and recommend next steps for care.

December 6, 2022

What parents should know about RSV

Upper respiratory infections are a common occurrence this time of year. As seasonal cases of influenza and RSV increase, find out how to manage symptoms at home and when to seek care.

Dennis Costakos MD By Dennis Costakos November 24, 2022

When to seek medical help for RSV or flu symptoms in children

With an early increase in RSV and influenza cases, a Mayo Clinic expert shares three things parents can watch for when determining if they should seek care for a sick child.

November 18, 2022

Hepatitis B vaccine: What to know to protect yourself

Chronic hepatitis B infection can go undiagnosed until serious liver disease symptoms arise. Learn why vaccination is the best way to prevent infection, and get additional tips to avoid getting the virus. 

Victoria Louwagie PAC By Victoria Louwagie November 15, 2022
Jessica Sheehy PAC By Jessica Sheehy November 15, 2022

Prepare for a challenging flu season: Get vaccinated now

After two mild flu seasons, a Mayo Clinic expert shares why this year's flu season may be different and how to protect your family from the flu virus.

October 20, 2022

Answers to questions about COVID-19 bivalent booster vaccines

A Mayo Clinic expert explains the bivalent booster, which protects against the original virus that causes COVID-19 and the omicron variants, BA.4 and BA.5.

October 14, 2022

Preparing kids for a flu shot: Tips to help parents

Now more than ever, it's important to schedule flu vaccinations for your entire family. You can help prepare your children for getting a shot with these tips.

Jennifer Johnson DO By Jennifer Johnson October 12, 2022

Don't skip your flu shot this year

Put up your best defense. It's time for your seasonal flu shot. Learn why it's more important than ever to be vaccinated.

Jennifer Johnson DO By Jennifer Johnson September 22, 2022

Expect a different flu season: Why you'll want to be vaccinated for the flu

This year's flu season could be different than the last two years. A Mayo Clinic expert explains why vaccination for flu will be important this year.

September 8, 2022

Monkeypox Q&A

Health officials continue to monitor and track increasing cases of monkeypox. Learn about symptoms, how it spreads, who should be tested and if a vaccine is available.

August 17, 2022