Cold & Flu Archive

A persistent cough that lasts longer than a few weeks can be worrisome, but for nonsmokers, the most common causes include asthma, bronchitis, gastroesophageal reflux disease, and medication for high blood pressure.

A recent analysis found evidence mixed on whether zinc can help prevent or treat a cold. However, there appears to be no significant harm from taking over-the-counter zinc products in safe amounts per the label's instructions.

Millions of Americans get influenza during most flu seasons. Good hygiene habits can help you avoid catching the virus, and a flu shot can substantially reduce your risk as well.

Ask the doctors

Q. I'm debating whether I need to get a flu shot this year. Do you think it's worthwhile?

A. The answer to this question is an emphatic yes. It's more important than ever to get a flu shot this year for a number of reasons. First, it will reduce your likelihood of contracting, being hospitalized for, or dying from influenza, which should be reason enough to roll up your sleeve. In addition, if you do get sick with the flu after being vaccinated, the vaccine can reduce the severity of your illness.

Research we're watching

Serious heart complications are common in people hospitalized with influenza, according to a study published online Aug. 25, 2020, by Annals of Internal Medicine.

Researchers from the CDC looked at the rates of cardiovascular problems in more than 80,000 adults hospitalized with a confirmed case of influenza (commonly called the flu) from 2010 to 2018. Almost 12% had a serious cardiovascular problem, most commonly heart failure or a lack of adequate blood flow to the heart, known as acute coronary syndrome. The body's immune response against the infection can trigger inflammation and other changes that harm the cardiovascular system.

These three remedies may reduce symptom duration and severity.

While there's no cure for the common cold, everyone seems to have a surefire remedy they embrace.

Some of the popular ones are sucking on zinc lozenges, boosting your vitamin C intake, and even slurping up steaming bowls of old-fashioned chicken soup.

In the journals

If winter brings you a sore throat and coughing, a spoonful of honey can be quite soothing. And it might even reduce symptoms from an upper respiratory tract infection, suggests a review of studies published online Aug. 18, 2020, by BMJ Evidence-Based Medicine. Upper respiratory infections (such as colds) are viral illnesses that affect the nose, throat, voice box, and large airways that lead to the lungs. Symptoms include a stuffy nose, congestion, sore throat, and cough. Researchers reviewed 14 studies of almost 1,800 people with upper respiratory infections being treated with either honey or usual methods (antihistamines, expectorants, cough suppressants, and painkillers). Honey appeared to improve symptoms (especially cough frequency and severity), and in some cases shorten the duration of symptoms by a day or two. The findings were only observational and don't prove honey is a cure. But honey has antimicrobial properties, and scientists say that in adults (but not in kids age one or younger), it's a harmless way to address symptoms.

Image: © Wojtek Skora/Getty Images

The nutrient appears to have modest prevention power.

Image: Wavebreakmedia Ltd/Thinkstock

Vitamin C is often touted as a natural cold remedy. The nutrient is featured in supplements promising to boost the immune system. Nobel laureate Dr. Linus Pauling famously claimed that taking large doses of vitamin C helps thwart a cold. Is there something to these claims? "The data show that vitamin C is only marginally beneficial when it comes to the common cold," says Dr. Bruce Bistrian, chief of clinical nutrition at Harvard-affiliated Beth Israel Deaconess Medical Center.

About vitamin C

Our bodies don't make vitamin C, but we need it for immune function, bone structure, iron absorption, and healthy skin. We get vitamin C from our diet, usually in citrus fruits, strawberries, green vegetables, and tomatoes. The Recommended Dietary Allowance for men is 90 milligrams (mg) per day, and for women, it's 75 mg per day.

Millions of Americans get coughs and colds during the winter, and many head to the drugstore to pick up one of the hundreds of common medicines available without a prescription. But those products often contain multiple active ingredients that are potentially unsafe if combined. Here's how to safely choose the right over-the-counter medication for your symptoms.