This Winter Gives Rise to ‘Super Flu’

A few weeks into the new year, several states, including Florida, have “very high” flu activity, according to the Centers for Disease Control and Prevention. 

So far this season, 15 million flu cases have been reported, with 180,000 hospitalizations.  

Many cases have been reported as subclade K, a newly identified variant of influenza A (H3N2), also referred to as the “super flu.” 

“New mutated variants are not necessarily more deadly compared to other strains, but they can be difficult for the body’s immune system to fight off due to a lack of prior immunity,” John Greene, MD, chair of the Infectious Diseases Program at Moffitt Cancer Center, said. “Therefore, it can make people feel more ill and sometimes cause a longer recovery timeframe.”  

Is it Too Late To Get The Flu Shot?  

Although flu season is already underway, Greene says it’s not too late to get the flu shot, especially for those who may be severely impacted by the illness.  

Those at an increased risk for developing serious flu complications includes those 65 and older, pregnant individuals, people with chronic health conditions, and those with a weakened immune system, including cancer patients.    

It takes about seven days to build immunity after receiving the flu shot.

John Greene, MD

“In immunocompromised patients, the flu can cause severe pneumonia,” Greene said. “If someone with a weakened immune system thinks they have the flu, it’s important to seek medical attention as soon as possible.”    

Who Should Get the Flu Shot?  

The CDC recommends that everyone 6 months and older get a flu shot. The flu shot does not contain live viruses — which can affect those with a weakened immune system — and is considered safe for cancer patients. However, the nasal mist version of the flu vaccine includes a weakened live virus and is not recommended for cancer patients.  

“It takes about seven days to build immunity after receiving the flu shot,” Greene said. “I encourage everyone to get their flu shot to help protect those who are more vulnerable.”    

 Flu season, which started in October, will end in May, with peak season falling between December and February.