Vaccinations Archive

Every day, more and more adults are getting vaccinated against COVID-19, helping us build toward herd immunity. But what about children and teens? What is the status of research on the vaccines in these groups, and when might vaccines be available for them?

In rare cases, people who have had cosmetic dermal fillers experience swelling after receiving the COVID-19 vaccine, but this shouldn't stop people with fillers from being vaccinated.

A history of discrimination in multiple settings, including health care, may make some people who identify as LGBTQ+ hesitant to get a COVID-19 vaccine, even though the virus has disproportionately harmed this community. If you're struggling to make a decision, this may help you consider benefits and risks.

Ask the doctors

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Q. I've read that getting the flu shot annually will weaken my immune system over time. Is this true?

A. A study published in the March 1, 2017, issue of The Journal of Infectious Diseases investigated whether getting an annual vaccination against influenza (flu) can weaken your body's natural ability to protect itself from the disease. Past studies have raised similar concerns. Researchers at the University of Bergen in Norway followed 250 health care workers. Some of them got a flu vaccination every year from 2009 through 2013. The others only received the vaccine once in 2009 and not in the years from 2010 to 2013. The researchers then took blood samples before the influenza season (and before people were vaccinated that season), from the members of both groups and looked at different markers to gauge how well their immune systems would respond to the influenza virus. They found that getting an annual flu vaccination did not weaken the immune system. As a group, the people who got the flu shot annually appeared to have a better immune response to influenza than those vaccinated only once.

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.

We don't yet have a vaccine to prevent COVID-19, but it's still important to get your regularly scheduled shots.

You're not alone if you're avoiding doctor visits because of concerns about COVID-19. But forgoing medical care means you may be skipping needed vaccinations. "That's a huge problem already. Possibly over a hundred million people the world over have missed their vaccinations because of the pandemic," says Dr. Shiv Pillai, an immunologist and professor of medicine at Harvard Medical School.

Going without vaccinations may increase your risk for illness, such as influenza. "We still are just as vulnerable to infection, and we need vaccines to be protected; COVID-19 doesn't change that," says Harvard Health Letter editor in chief Dr. Anthony Komaroff.

Even in an unusual year, tried-and-true strategies are still the best way to prevent illness.

Staying healthy is likely at the top of your list almost every winter. But this year, in the midst of a pandemic, it may be even more of a concern than usual. You might wonder: should you be taking special supplements to boost your immune system, or investing in cleaning devices to zap germs?

While the viral threats may be different from usual this year, the truth is that you should still be using many of the same strategies that you use in a typical year, says Michael Starnbach, a professor of microbiology at Harvard Medical School. Below are five of his top tips that can help you keep yourself and your loved ones safe.

Ask the doctor

Q. Will we have a vaccine to prevent COVID-19 and, if so, when?

A. I'm optimistic because never in human history has so much scientific time and effort been spent trying to make a vaccine. But it won't it be easy. As fast as possible, the vaccine scientists need to prove, first, that a vaccine is safe (minimal side effects) and, second, that it works to reduce a person's risk of getting the disease. Then they need to produce enough of it to immunize most of the 7.6 billion people on earth. Doing all of this within two to three years of a new virus being discovered would be an unprecedented achievement.