Diseases & Conditions Archive

One antiviral medication has drawn criticism, but it's still a treatment option.

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Bad case of the flu? Antiviral medications, such as oseltamivir (Tamiflu) or zanamivir (Relenza), may reduce symptoms and help you recover from the flu a day or two earlier. But oseltamivir came under fire a few months ago for a lack of effectiveness.

In June, the World Health Organization (WHO) removed oseltamivir from its list of essential medicines. "Their decision was based on the relatively low effectiveness of oseltamivir in clinical trials and clinical practice. I suspect this is due to a significant number of people who started therapy after their flu symptoms had been going on for more than two days," says Dr. Paul Sax, an infectious disease specialist and Harvard Medical School professor.

News briefs

Many Americans may be living with the precursor condition to type 2 diabetes without even knowing it, according to a report released July 18, 2017, by the CDC. The National Diabetes Statistics Report found that more than 84 million people in the United States likely have prediabetes — higher-than-normal blood sugar levels.

Prediabetes can turn into full-blown type 2 diabetes — meaning the body doesn't respond to insulin, a hormone that helps cells absorb blood sugar for energy. Type 2 diabetes increases the risk for vision loss; heart disease; stroke; kidney failure; amputation of toes, feet, or legs; and even early death. The report found that almost one in four people with diabetes is undiagnosed.

Ask the doctors

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Q. A friend and I both recently had ear blockages caused by impacted earwax. Is this something that becomes more common with age, or is it just a coincidence?

A. It's not just a coincidence. Earwax blockages definitely increase with age. While blockages affect only 5% of healthy adults, they occur more often in older people, with 57% of nursing home residents experiencing this problem, according to the American Academy of Family Physicians.

Want to keep your mind sharp? Be aggressive about treating your high blood pressure.

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If you're like a lot of people, you probably think of your heart when you think about blood pressure. But you should also think about your mind.

"High blood pressure is not just a disease or condition. It's actually a risk factor. It's a risk factor for heart disease and stroke, and it's a risk factor for cognitive decline and dementia," says Dr. Natalia Rost, a stroke neurologist at Massachusetts General Hospital and associate professor of neurology at Harvard Medical School.

Here are the answers to six commonly asked questions about colds and the flu.

Q. When should I stay home from work or keep my child home from school?

Watch out for unpasteurized products, and ask vendors about food safety.

There's something magical about strolling through a farmers' market on a crisp autumn morning. The fruit and vegetables seem fresher there than they do in a store — apples taste tarter, tomatoes seem redder and riper. It's a farm-to-table connection that puts you in touch with nature and the harvest.

Maybe that's partly behind the explosion of farmers' markets across the country, climbing from about 2,000 markets in 1994 to more than 8,600 today, according to the Farmers Market Coalition. "It's a great way to get fresh produce and try different foods you may not have come across before. But it should be enjoyed with caution," urges Dr. Simi Padival, an infectious disease specialist with Harvard-affiliated Beth Israel Deaconess Medical Center.

Research we're watching

Not only is obesity a risk factor for flu complications, but it might actually make the flu vaccine less effective, says a study published online June 6, 2017, by the International Journal of Obesity. Scientists at the University of North Carolina at Chapel Hill found that the flu shot provides less protection in people who are obese.

The study compared flu rates in 1,022 people during two recent flu seasons. All participants were vaccinated against the flu. The researchers looked at immune response to the vaccine and also tracked who went on to get the virus. They found that nearly 10% of obese participants got the flu, compared with 5% of their healthy-weight counterparts. This is bad news, because individuals with a body mass index of 40 or higher are also more prone to flu complications.

In the journals

If you get acute conjunctivitis, or pinkeye, you probably don't need antibiotic eye drops, suggests a study published online June 14, 2017, by Ophthalmology.

Pinkeye is caused by viral infection, allergy, or bacterial infection. Most people with pinkeye are prescribed antibiotic drops. However, a majority of cases are due to a virus or allergy, which do not respond to antibiotics. Antibiotic treatment can potentially delay healing and increase antibiotic resistance.

Many people with hearing loss also have tinnitus, commonly known as ringing in the ear. This phrase is misleading, however, because some people hear ringing while others hear whistles, chirping, or a combination of sounds. Regardless of the particular sound, the distinguishing feature is that it doesn't have an external cause. People with tinnitus hear sounds that people around them don't hear. This isn't to say that tinnitus isn't real—researchers at the National Institute on Deafness and Other Communication Disorders have detected changes in brain activity that occur with tinnitus.

Strategies that can help

Some people with hearing loss and tinnitus find that both problems improve after they get a hearing aid or have a cochlear implant. Others find that their tinnitus symptoms improve somewhat when they cut down on caffeine and alcohol, reduce the amount of fat in their diets, and quit smoking. The following techniques may also help reduce your tinnitus symptoms:

Looking at a screen too long may lead to computer vision syndrome.

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There are many reasons to restrict the amount of time you spend in front of an electronic screen. For example, more hours sitting at a computer or smartphone means fewer hours of being physically active, and looking at a computer screen at night can stimulate the brain and make it difficult to fall asleep.

Here's another reason to curb screen time: a problem called computer vision syndrome — an umbrella term for conditions that result from looking at a computer or smartphone screen. "It's most prevalent with computers, and typically occurs when looking at a screen at arm's length or closer," says Dr. Matthew Gardiner, an ophthalmologist with Harvard-affiliated Massachusetts Eye and Ear Infirmary.