Repeat of Last Year or a ‘Twindemic?’

Nov. 19, 2021 — Cases of the flu, that once annual viral intruder that was regularly the country’s worst annual health crisis, is showing signs of waking up again this fall.

But, experts say, it is far too early to say if the country will have a normal – i.e., bad – flu season or a repeat of last year, when the flu all but disappeared amid the COVID-19 pandemic.

This flu season is starting out more like the seasons before the pandemic. About 2% of all visits to doctors and outpatient clinics through Nov. 13 were flu or flu-like illnesses, compared to about 1.4% a year ago, the CDC says. Cases so far are being counted in the hundreds – 702 through Nov. 13.

Still, while cases are low, they are increasing, the agency says. The spread of flu is already high in New Mexico and moderate in Georgia. The rest of the country is seeing little activity, according to the CDC.

Already, Schaffner says, “we are beginning to hear about some outbreaks.”

One outbreak triggering concern is at the University of Michigan, Ann Arbor, where 528 flu cases have been diagnosed at the University Health Service since Oct. 6. The CDC sent a team to investigate the outbreak. Florida A&M University and Florida State University have also seen large outbreaks this month.

Outbreaks on college campuses are not surprising, Schaffner said. “That’s a population that is under-vaccinated,” he says, and students are often in close quarters with many others. University of Michigan officials said 77% of the cases are in unvaccinated people.”

Predictions about this year’s flu season also have to take into account that mask wearing and social distancing that were common last year, but have become less common or sometimes nonexistent this year.

Despite uncertainty about how this year’s flu season will play out, several changes and advances in play for this year’s flu season are aimed at keeping illness low.

• The composition of the vaccines has been updated — and each vaccine targets four viruses expected to circulate.
• The flu vaccine and the COVID vaccines can be given at the same time.
• The CDC has updated guidance for timing of the flu vaccine for some people.
• A new dashboard is tracking flu vaccination rates nationwide, and the CDC has an education campaign, fearing the importance of the flu vaccine has taken a back seat with the attention largely on COVID and its vaccine since the pandemic began.

Several of the formulas are approved for use in those age 65 and up, including a high-dose vaccine and the adjuvanted flu vaccine. The aim of each is to create a stronger immune response, as people’s immune systems weaken with age. However, the CDC cautions people not to put off the vaccination while waiting for the high-dose or adjuvanted. Getting the vaccine that’s available is the best thing to do, experts say.

And, Tan says, ”the flu vaccine is not going to amplify any reaction you would have to the COVID vaccine.”

Tracking Vaccinations

According to the CDC National Flu Vaccination Dashboard, about 162 million doses of flu vaccine have been distributed as of Nov. 5.

It expects about 58.5% of the population to get a flu shot this season, up from about 54.8% last season.

Undoing the ‘Flu Isn’t Bad’ Thinking

One common misconception, especially from parents, is that ”the flu is not bad, it doesn’t cause serious problems,” says Flor M. Munoz, MD, MSc, medical director of transplant infectious diseases at Texas Children’s Hospital in Houston.

“Flu by itself can be serious,” she says. And now, with COVID, she says, ”we do worry. If someone got both infections, they could get quite sick.”

Among the potential complications in kids, especially those under 5 years, are pneumonia, dehydration, brain dysfunction and sinus and ear infections.

The vaccine for flu, like for COVID, isn’t perfect, she also tells parents. “In a good year, it gives 60 to 70% protection. ” But it can be much less protective than that, too. Even so, “if you get vaccinated and still get the flu, you will have milder illness.”

Anti-Virals to the Rescue

When flu symptoms — fever, cough, sore throat, runny nose, body aches, headaches, chills and fatigue — appear, anti-viral treatments can lessen the time you are sick by about a day, according to the CDC. They are available only by prescription and work best when started within 2 days of becoming sick with flu.

Four antiviral drugs to treat flu are FDA-approved, including:

• Oseltamivir phosphate (generic or as Tamiflu)
• Zanamivir (Relenza)
• Peramivir (Rapivab)
• Baloxavir marboxil (Xofluza)

Depending on the drug and method of administration, the drugs are given for 1 to 5 days, generally, but sometimes longer than 5 days.

Track Local Flu Rates

Ray of Johns Hopkins suggests keeping an eye on how widespread flu is in your community, just as we’ve gotten used to tracking COVID rates, and then taking precautions such as masking up and social distancing. “Maybe we are a little more nimble now in responding to risk,” he says, given the practice gotten with COVID.

He says adapting these habits in responding to flu outbreaks would be helpful—and more natural for most people than in the past. ”I don’t think it was usual ever, 3 years ago, to see people out in masks when flu rates were high.”