Dear Commons Community,

COVID cases are on the rise this summer as the COVID-19 FLiRT variants spread.

According to the most recent estimates from the Centers for Disease Control and Prevention (CDC) released on August 3rd, 27.8% of cases are the KP.3.1.1 strain and 20.1% of current infections are KP.3. Both of these variants stem from the FLiRT family of the coronavirus. Another variant that is not a descendant of FLiRT, named LB.1, makes up an estimated 16% of COVID-19 cases at the moment.  As reported by Good Housekeeping and CBS News.

“The FLiRT variant appeared in March,” says Tammy Lundstrom, M.D., J.D., the senior vice president at Trinity Health who led their COVID-19 response. “Throughout the COVID-19 era, new strains have continued to arise. Like other strains, it appears highly transmissible, but it does not appear more virulent at this point.”

While it’s great that COVID-19 cases don’t seem to be as dangerous as they used to be, it still causes unpleasant symptoms which can be severe for people with certain risk factors. Unfortunately, just 22.5% of American adults had received the most recent COVID-19 vaccine as of May 11, 2024 (when the latest data was released). Could this be contributing to the summer surge we’re experiencing? We turned to experts to learn more about the newest variants, important COVID-19 symptoms to be aware of and how to protect yourself and your loved ones.

What are the FLiRT and LB.1 variants?

As fun as the name sounds, FLiRT is not the official designation for the dominant COVID-19 variant. That is actually a cheeky nickname for a whole family of different variants (any that start with KP). “The FLiRT variants came to the forefront at the end of April,” says Nikhil K. Bhayani, M.D., FIDSA, an infectious disease specialist and assistant professor at the Burnett School of Medicine at Texas Christian University.

KP.2, KP.2.3, KP.3 and KP.3.1.1 are official names of the FLiRT variants that are circulating right now. While FLiRT took over JN.1 as the dominant variant, it’s actually a descendant of JN.1. Essentially, the “parent” variant (JN.1) was unseated by several “child” variants. Various variations of JN.1 are still swirling in some capacity, but they make up a smaller percentage of COVID-19 cases. LB.1, another variant that has been circulating this summer, is not a member of the FLiRT family, but another descendant of JN.1.

Is there a summer surge?

Yes, the wastewater viral activity for COVID-19 — how the CDC tracks trends in infectious disease circulating in a community — is currently listed as “very high,” according to the most recent CDC data. However, a summer surge is not unique to FLiRT.

“Throughout the COVID-19 era, we have seen a rise in infections during summer,” says Dr. Lundstrom. Two reasons for this, according to the CDC, are that people tend to do more traveling during the summer and also congregate indoors with air conditioners on when it’s very hot outside.

What are the symptoms?

The good news is that the FLiRT and LB.1 strains of the coronavirus don’t seem to spark any surprise symptoms. “The symptoms are similar to other COVID-19 strains,” says Dr. Lundstrom. The CDC updated its list of possible symptoms on June 25th, and those include:

• Fever or chills
• Cough
• Shortness of breath or difficulty breathing
• Sore throat
• Congestion or runny nose
• New loss of taste or smell
• Fatigue
• Muscle or body aches
• Headache
• Nausea or vomiting
• Diarrhea

“Like similar recent strains, the incidence of loss of taste and smell are not prominent,” adds Lundstrom.

How long do symptoms last?

It really depends on the person. Typically, people with mild cases will experience symptoms for 5-10 days, however, many may start to feel better sooner than that. According to the CDC, most people with long COVID will start to feel better after three months, although it can last years. It’s best to speak to your doctor if any of your symptoms are lingering.

Is there a new vaccine?

Our experts said that vaccines still provide good protection against COVID-19, “especially against severe illness and hospitalization,” says Dr. Lundstrom. However, a study published in April found that KP.2 is proving to have “the most significant resistance” to the 2023-24 COVID-19 booster, and that this “increased immune resistance ability of KP.2 partially contributes to the higher” prevalence of infections “than previous variants, including JN.1.”

At the end of June, the CDC recommended that everyone ages 6 months and older receive the updated 2024-25 COVID-19 vaccine, which was tweaked based on the most dominant variants circulating this year. The most updated COVID-19 vaccine is expected to be rolled out this fall. “The World Health Organization is recommending the upcoming COVID booster to be based on the predominant lineage for the year,” adds Dr. Bhayani.

However, the CDC and our experts still recommend the current vaccine to protect yourself before the 2024-25 booster is made available in the fall. “Adults over the age of 65 should get the last COVID-19 vaccine available,” says Bhayani. Dr. Lundstrom suggests that older adults “should be vaccinated four months after their last vaccination” and those with compromised immune systems “should get vaccinated two months after their last dose.”

How to protect yourself

In March, the CDC updated the Respiratory Virus Guidance as COVID-19 cases have decreased over time. “It is still an important health threat, but it is no longer the emergency that it once was, and its health impacts increasingly resemble those of other respiratory viral illnesses, including flu and RSV,” the new guidance states.

“The same precautions will help protect against the spread of most respiratory viruses: wash hands frequently, cover your mouth and nose when sneezing/coughing, stay up to date with vaccinations and stay home when ill to prevent spreading infection to others,” suggests Dr. Lundstrom. However, Dr. Bhayani reminds us that the elderly, individuals with compromised immune systems and kids “should take extra precautions, such as avoiding large crowds and wear masks if COVID-19 cases are on the rise locally.”

If you do get sick, the CDC still recommends staying at home until your symptoms are improving overall, and you have not had a fever (and are not using fever-reducing medication). Afterward, you can resume normal activities and “use added prevention strategies over the next five days.”

Tony