You may have noticed that more people you know have gotten COVID-19 recently. One reason is the virus that causes COVID-19 continues to evolve into variants that are more contagious.

The latest one is known as XBB.1.5, and since early December it has become the predominant variant in the New York metropolitan area, according to the Centers for Disease Control and Prevention (CDC).

This variant is thought to be highly transmissible due to its ability to partially evade antibodies produced through vaccines or past infections. However, the vaccines still offer excellent protection against severe illness and death.

In this Q&A, Bernard Camins, MD, MSc, Professor of Medicine (Infectious Diseases) at the Icahn School of Medicine at Mount Sinai and the Medical Director for Infection Prevention for the Mount Sinai Health System, explains more about the new variant and how to protect yourself.

How does this new variant differ from the earlier variants?

The nature of COVID-19 is that the new variants are likely going to be more contagious than the older ones. There is currently no evidence that this latest variant is more dangerous. The symptoms do not appear different.

 Does the newest, updated booster shot help protect me from this new variant?

According to the CDC, being up to date with the bivalent booster that became available in September 2022 offers the best protection against COVID-19. (It is the only booster now available.) The updated bivalent booster specifically targets both the BA.5 sub variant of Omicron, of which XBB.1.5 is a descendent, and the original SARS-CoV-2 virus. The original COVID-19 monovalent vaccines, and the monovalent booster that became available in the fall of 2021, only target the original virus, and therefore potentially offer less protection against the Omicron subvariants.

 I was recently infected with COVID-19. How long should I wait to get the latest bivalent booster?

You may consider waiting up to 90 days from your last infection before getting the bivalent booster. Reinfection is less likely in the weeks and months after infection. But you may want to talk with your provider if you are at increased risk of severe disease.

 I never got any vaccines. Can I skip the first and second monovalent vaccines and just get the bivalent booster?

No. Before you can get the bivalent booster, you still need to get two doses of the monovalent vaccine.

 I received my bivalent booster more than two months ago. Has my immunity started to wane?

Your immunity does begin to wane after three to four months, probably more so if you’re older, such as older than 50.

 Can I get another dose to bolster my immunity?

No. Currently, there are no more recommended doses after you have already gotten the bivalent booster, regardless of how long it has been.

 Will the bivalent booster and antiviral medications prevent me from developing long COVID?

We do not have definitive data yet to know how much protection the bivalent booster and antiviral medications such as Paxlovid™ offer against the development of long COVID. But we do know that being vaccinated certainly reduces your risk of developing it.

I am at high risk for complications from COVID-19. What should I do to protect myself from the latest subvariant?

Because COVID-19 is so widespread now, it’s hard to avoid getting infected or exposed. While it is reasonable to take precautions to avoid a COVID-19 infection, the goal should be to reduce the severity or prevent complications when you do get COVID-19. High-risk individuals should have a plan for how to get antiviral medications, which can prevent severe illness or death. For this to work, you must take the medications within the first five days of symptom onset. If you have not done so already, you should talk with your doctor or your care provider to create a plan for what antivirals you would need and how to get them. Having a plan is also important because you may be on medications that interact with certain antivirals, and you may need to stop taking those medications temporarily to prevent drug interactions. Those at high risk include older adults, those with chronic medical conditions, such as diabetes, and those with reduced ability to fight infections, such as those being treated for some cancers.

Parents of young kids finally have important news they have been waiting for: health authorities have authorized COVID-19 vaccines for kids six months to five years old.

This is welcome news for families and their younger children who have had to face the prospect of getting sick and have had to avoid many of their regular activities.

Federal health authorities have authorized the Moderna vaccine for children ages 6 months through 5 years, and the Pfizer-BioNTech vaccine for children ages 6 months through 4 years. The Pfizer vaccine requires three doses; the Moderna vaccine requires two doses. Pfizer’s vaccine was authorized for children ages 5 and over last November; the Moderna vaccine has now also been authorized for the  5-17 age group.

In this Q&A, Lindsey C. Douglas, MD, MSCR, a pediatrician at Mount Sinai Kravis Children’s Hospital, explains why parents should get their young kids vaccinated as soon as possible. Dr. Douglas is Medical Director, Children’s Quality and Safety, and Pediatric Hospital Medicine, and she is also Associate Professor of Pediatrics at the Icahn School of Medicine at Mount Sinai.

Why should I get the vaccine for my child six months to five years of age? What are the benefits and risks?

We’re really excited that the vaccine has been approved for children six months to five years of age, so now nearly all children can get vaccinated. The vaccine does, in fact, reduce the chances that a child will get COVID-19. Many people who have looked at the data believe the reduction doesn’t seem to be that much. But we know that the vaccine reduces the chance that a child will get severe COVID, and that is really important. Children are being hospitalized with COVID-19, and that is something we worry about. Also, the vaccine will help us truly get back to normal, with children being able to be around other children, around their grandparents, and reducing the risks of transmission in general. We hope this will get us back to where we were before the pandemic, so that we can all gather together and not be as worried about COVID-19.

Two vaccines are recommended. What are the differences and does it matter which vaccine I get?

We have some information about both of them. There were studies that were done for the authorization by the Food and Drug Administration, and the two vaccines seem to have similar efficacy. However, the doses are different, and the timing is different. There are three doses for the Pfizer vaccine and two doses for the Moderna vaccine. My recommendation is to get the one that’s easiest for you to get, the one that’s available at your pediatrician. The differences are probably not as important as the difference between having the vaccine and not having the vaccine. You can talk with your pediatrician if you have other questions.

Will children experience any side effects?

Side effects have been quite minimal, and they’re similar to other vaccines, which include soreness at the site of the shot, and some children experienced fevers and body aches. I like to think of these as proof that the vaccine is working, that your immune system is actually activated and working.

What can I do about these side effects?

You can give your young child acetaminophen (Tylenol) or ibuprofen (Advil or Motrin). They can help with fever and muscle aches. Some medications, such as ibuprofen, work as anti-inflammatory medications, whereas acetaminophen does not. Some believe anti-inflammatory medications may also block the immune response. I have two children of my own who are between five and 11 and had the vaccine, and I tried to wait it out with them, so that they could have the most potent response. The symptoms typically last only about a day. If you need to use something, I suggest acetaminophen.

What does the data show about how effective the vaccine is?

The effectiveness of the vaccine was shown in how often a child would get COVID-19. But that’s not the only  thing that we worry about. The other thing that I worry about, as a pediatrician who takes care of hospitalized children, is preventing severe disease. There is not as much data on that, so it’s something that each parent should think about. Preventing severe disease in children is really important, and so is getting back to school and playgroups and all of the things that smaller children need for their development. Those to me are equally as important as not getting COVID-19 at all.

Are kids five and under at risk for serious disease?

People believe children don’t get COVID-19 as often or there are fewer cases of COVID-19 than in adults. That technically is true. More adults have been hospitalized. But there are children who have died from COVID-19. My opinion is this vaccine prevents both serious disease and hospitalization of a child, and that means it makes sense to get your child vaccinated.

Why is there no vaccine for kids under six months?

The studies for these vaccines were done in children over six months of age because the immune system is not fully formed in children under six months. We do start shots in infants as early as two months of age, but many vaccines can’t be given until kids are older, including the chickenpox shot. We tend to be much more careful with vaccines in children under six months of age.

If my child already had COVID-19, do they still need a vaccine?

Unfortunately, getting COVID-19 doesn’t prevent you from getting it again. I recommend that a child who has had COVID-19 be vaccinated. We know that vaccination is a strong way to prevent disease and prevent severe disease, and having some natural immunity from having the disease also provides some protection. The combination of the two is even better.

Is there anything else that patients and consumers should know?

The COVID-19 vaccines have been available for quite some time now. Kids under five are not that much different from those older than five. As a pediatrician, and as a parent myself, I’m thrilled that we can offer the vaccine to our most vulnerable and youngest children. This age group has been out of school the most of any age group because of not being eligible for the vaccine and not being able to wear masks easily. I urge parents to consider getting their children vaccinated today.