Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Policy
While social distancing and mask-wearing resulted in an unusually quiet flu season last year, there’s still a risk of sick patients across the country, crowding doctors’ offices and putting additional pressure on hospitals already stressed from treating COVID-19 patients.
Getting your flu vaccine is vital to not just keeping you and your family healthy, but relieving our over-burdened healthcare system. But with COVID-19 vaccines widely available and some people eligible for third doses, there may be more questions about timing vaccines.
To learn more about the importance of getting both the flu and COVID-19 vaccines, we talked to infectious disease doctor Susan Rehm, MD and infectious disease clinical pharmacist Kaitlyn Rivard, PharmD.
Why getting the flu vaccine is so important
First of all, you should get a flu shot every year. It’s just good practice, as Dr. Rehm explains. “Influenza is a very serious disease and during a normal flu season, around 40,000 or more people die from it. So with any preventable disease, we should do everything we can to protect ourselves.”
But it’s especially important this year, she continues. “We’re going to have influenza and COVID-19 coexisting and there’s a lot of overlap between the symptoms. We also anticipate that there will be some people who have COVID-19 and influenza at the same time, which could be difficult.”
Part of what would make such a scenario so calamitous, Dr. Rehm says, is that our national healthcare system could be inundated in some regions. “We’ve seen problems in various places because of the delta variant surge and if we add influenza on top that, it could overwhelm our capacity.”
When to get a flu shot
Both Drs. Rehm and Rivard advise getting a flu vaccine as soon as it becomes available. Many healthcare providers, including Cleveland Clinic, began offering the flu vaccine at the beginning of September.
Does the flu vaccine interfere with the COVID-19 vaccine?
No, says both Rivard and Dr. Rehm. In fact, if you haven’t received a COVID-19 vaccination yet or are receiving a third dose, you can receive it at the same time as your flu vaccine.
“All available COVID-19 vaccines can be given at the same time as the flu vaccine,” says Rivard. “If someone is coming in for their flu shot and they’re eligible for COVID-19 vaccine but haven’t received it yet, we can offer that.”
If you’re receiving one of the mRNA COVID-19 vaccines (Pfizer or Moderna), which require two doses, you can receive the flu vaccine alongside either the first or second dose. “Both the CDC and the Advisory Committee on Immunization Practices recommend co-administering almost any two vaccines together,” Rivard adds.
She adds that there are very few instances in which certain vaccines can’t be administered at the same time, noting that children often receive multiple vaccines during one visit to a pediatrician.
And there’s no concern about overloading our immune systems with multiple vaccines, notes Dr. Rehm. “We’re exposed to things that stimulate our immune system all the time,” she says. “Our immune system is constantly responding to various exposures even if you don’t realize it.”
Yes, you need both vaccines
While both the flu and COVID-19 are respiratory diseases with overlapping symptoms, you still need and a specific vaccine to protect you against each virus.
In other words, the flu vaccine won’t you protect you from COVID-19 and the COVID-19 vaccine won’t protect you from the flu.
And while no vaccine is 100% effective in keeping you from getting sick, as recent breakthrough COVID-19 infections have shown, these vaccines can often lessen the effects of the disease. “In many cases, being vaccinated helps reduce the severity of the illness,” says Dr. Rehm.
Will getting both vaccines at once enhance any side effects?
If you get both your flu vaccine and a COVID-19 shot at the same time, you shouldn’t see any enhanced side effects. “We see a higher degree of side effects with the COVID-19 vaccines, particularly the second dose of the mRNA vaccines,” says Rivard. “That’s our immune system building up a response.”
“Someone who receives both vaccines together will probably still see those expected side effects – achiness, soreness where you received the shot, tiredness – but nothing more than they would see if they got one of the vaccines on its own,” she says.
Don’t be scared away by COVID-19
Even though the risk of contracting COVID-19 remains, particularly with the highly contagious delta variant, it’s important that people still make it out to a healthcare provider to receive their flu vaccine.
“Healthcare facilities are taking extra precautions to make the environment safe for people who come in,” Dr. Rehm notes. “Masking and social distancing are taking place. And the reality is that the risk of not going in for the vaccine is higher than going in for the vaccine because it is such a safe environment.”
That goes equally for kids, too. Just as it’s important to keep their immunization schedule on track despite the pandemic, it’s also crucial to get them vaccinated for the flu, Dr. Rehm says. “It’s important for children to get the flu vaccine, too, because the circulation of flu in children, if nothing else, puts adults at risk, too.”
“Influenza is a serious disease and it’s unpredictable,” she says, “and otherwise healthy children are unfortunately hospitalized and die every year because of it. So even for normal, healthy children, it’s really important to get vaccinated every year.”
Finally, she adds, “When young children get the vaccine for the first time, they need two doses separated by a few weeks in order to boost their immunity to the point that they’re protected against influenza. Check with your doctor for the specifics.”
The troubling similarities between the flu and COVID-19
Because many respiratory viruses, including COVID-19 and the flu, share overlapping symptoms, it can be hard to tell the difference which one you might have based on symptoms alone. Some of the overlapping symptoms include:
- Sore Throat.
- Muscle aches.
Dr. Rehm says, “People who think they have a respiratory illness like COVID-19, influenza or respiratory syncytial virus (RSV) should call their healthcare provider and see if testing is appropriate.”
Testing is important not just for identifying which disease you have, she says, but it also enables doctors to see what specific illnesses are circulating in a community.
According to Rivard, some tests can identify as many as a dozen different respiratory viruses. The caveat, though, is that these tests are usually reserved for children. “Children have many more viruses they’re exposed to that could cause infection compared to adults,” she says.
Similar tests can be used for adults, says Dr. Rehm, but, again, they’re typically only used in certain circumstances. “Not every patient with a respiratory illness needs to be tested for a dozen viruses,” she says. “Those tests are primarily used for hospitalized or immunocompromised adults.”
The importance of social distancing
Two reasons that last flu season was such a quiet one: social distancing and improved hygiene, says Dr. Rehm. “Last year, the use of face masks, social distancing and paying more attention to hand-washing all impacted the lower rates of flu and other respiratory viruses,” she says.
“All of these things are still part of our strategy going forward, not just to prevent COVID-19 and the flu, but other viruses, too,” she adds. “Having robust vaccines adds to these levels of protection.”
Seriously. Get a flu shot!
One reason it’s so important to get your annual flu shot (and the COVID-19 vaccine, too), according to Dr. Rehm: protecting yourself is a lot easier than treating these illnesses.
“There are some treatments available for the flu and treatments we have for COVID-19 are evolving,” she says. “But to avoid the disease altogether or to only have a mild case because you’ve been vaccinated is much better than trying to treat it. Prevention is best.”