Infectious diseases Archive

Rapid COVID tests aren't foolproof, but can provide an added layer of assurance if people take them before a planned gathering, in addition to following other preventive strategies.

If you are gathering with family or friends during this holiday season there is still a lot of uncertainty around how to help keep everyone as safe as possible from COVID-19 illnesses and hospitalizations, particularly when many people will be traveling. Harvard Health Publishing faculty contributors share their own holiday plans and offer advice for safely enjoying the holidays this year.

COVID-19 infections may raise the risk of developing diabetes, because the virus can damage insulin-producing cells in the pancreas.

It is possible to get shingles more than once. But getting vaccinated with the Shingrix vaccine may help prevent this from occurring.

Evidence suggests that people who've had COVID-19 may have some natural protection against the virus, but will have a much stronger immune response if they also get the vaccine.

Last winter's flu season was mild, partly due to record high rates of flu vaccination and steps people were already taking to protect themselves from COVID-19. But don't let that fool you — some flu seasons are severe, so it it's wise to get a flu shot and take other precautions that can help you stay healthy this winter.

Evidence suggests that people who recover from COVID-19 have an increased risk for developing new health problems, including heart attacks, high blood pressure, diabetes, high cholesterol, muscle inflammation, blood clots that travel to the lungs, strokes from clots or hemorrhages, or psychosis. This is in addition to permanent damage that can result from having COVID, including damage to the lungs, heart, kidneys, brain, or other organs; and debilitating fatigue, difficulty thinking, and other symptoms that make it hard to function normally at work or at home.