Cold and Flu

Flu news: Now most people with egg allergies can get a flu shot

Wynne Armand, MD
Wynne Armand, MD, Contributing Editor

If you have been avoiding the flu shot because you’re allergic to eggs, studies suggest that you can safely get vaccinated. Allergic reactions to the flu shot are quite rare. If you’ve never had a reaction to a flu shot, protect yourself by getting one this year. Ideally do it in a doctor’s office or hospital so that you can get prompt treatment in the unlikely event you have an immediate, severe reaction.

When do you really need antibiotics for that sinus infection?

Monique Tello, MD, MPH
Monique Tello, MD, MPH, Contributing Editor

Many people with sinus infections expect to be given antibiotics for treatment, but in most cases the infection will improve on its own. If a person’s symptoms meet certain criteria — for example, when colorful nasal discharge and facial pressure and pain last for more than 10 days — then antibiotics are recommended.

A bummer for kids: Nasal flu vaccine not effective

Claire McCarthy, MD
Claire McCarthy, MD, Faculty Editor, Harvard Health Publications

For years, many kids could skip the traditional flu “shot” — along with the tears — and still be protected by the nasal spray vaccine also known as the LAIV (live attenuated influenza vaccine). But not this year. Studies now show that the nasal vaccine is quite ineffective, and pediatricians are starting to change their flu recommendations from a nose squirt to a shot.

Don’t judge your mucus by its color

Robert H. Shmerling, MD
Robert H. Shmerling, MD, Faculty Editor, Harvard Health Publications

Many people still think the color or consistency of nasal discharge determines whether you have a sinus infection. The truth is that anything that irritates the nose’s delicate lining — whether a virus, bacterium, or allergen — can result in any color or consistency of discharge. In fact, viruses are the most common cause of sinus infections, meaning you shouldn’t run to your doctor based on your mucus color alone.

Cold and flu warning: The dangers of too much acetaminophen

Susan Farrell, MD
Susan Farrell, MD, Contributing Editor

Many common cold and flu medications and prescription-strength pain relievers contain acetaminophen (Tylenol) as one of their active ingredients. If you take several of these drugs at once during a bout of cold or flu, you might accidentally take more than the safe dose of acetaminophen, potentially causing liver damage. It’s always best to read the labels — and to keep in mind that most winter viruses get better on their own with rest, fluids, and time.

Why your wheezing baby may need TLC, not medication

Claire McCarthy, MD
Claire McCarthy, MD, Faculty Editor, Harvard Health Publications

If your baby is sick with fever, cough, and wheezing, it’s natural to think he or she needs medication. But if the culprit is bronchiolitis — a bad cold that has settled into the lungs — the best treatment is usually no treatment at all. That’s because treatments like antibiotics don’t work against bronchiolitis, and can cause unwanted side effects. Of course, you should always check in with your doctor if you think your baby has bronchiolitis.

Do statins interfere with the flu vaccine?

John Ross, MD, FIDSA
John Ross, MD, FIDSA, Contributing Editor

The statin drugs are very effective at reducing LDL (“bad”) cholesterol and may also reduce inflammation throughout the body. Both of these properties can reduce the risk of cardiovascular problems. At the same time, research — some of it conflicting — suggests that statins may also affect the body’s immune system. In particular, they may dampen the response to vaccines.

Kids and flu shots: Two common myths

Claire McCarthy, MD
Claire McCarthy, MD, Faculty Editor, Harvard Health Publications

“Last time I got the flu shot, it actually made me sick!” “My kids are perfectly healthy. They’ll be fine.” You’ve probably heard a version of these two before. These flu shot myths are so persistent that they prevent countless numbers of people from getting vaccinated each year. We’ve debunked these claims here to help you make your flu shot decision based on facts — not myths.

Get the flu vaccine, reduce your risk of death

John Ross, MD, FIDSA
John Ross, MD, FIDSA, Contributing Editor

Last year’s flu vaccine gave a lackluster performance — it prevented the flu in less than a quarter of the people who got immunized. Flu vaccines are created to protect against the three or four viruses most likely to cause the flu in a given season. Some years, the predictions are better than others. Scientists are now working on a universal flu vaccine that may make the guesswork unnecessary. And there are improved vaccines available for people with egg allergies, which would otherwise prohibit them from getting standard flu shots. The flu vaccine may be imperfect, but it’s still worth getting. It does lower your chances of getting the flu, and it reduces the risk for heart attack, stroke, and death as well.

This year’s flu vaccine “disappointing” against main flu virus

Howard LeWine, M.D.
Howard LeWine, M.D., Chief Medical Editor, Internet Publishing, Harvard Health Publications

Some years the flu vaccine works quite well. Other years it doesn’t. It has done a particularly poor job this year against the main flu virus. The CDC reported yesterday that this year’s flu vaccine has been just 18% effective. The estimate for children is even lower. And it looks like the nasal spray vaccine may not have worked at all among children. One reason for this year’s mismatch between virus and vaccine is that experts must decide months in advance which of the hundreds of flu viruses to include in the vaccine. What became the dominant flu virus this year, a new strain of H3N2 influenza A, wasn’t around last year when experts were determining this year’s vaccine.