Immunity debt hypothesis for flu after COVID restrictions supported by study

Global study supports the immunity debt hypothesis for flu after COVID restrictions The COVID-19 pandemic led many countries around the world to implement strict public health measures like lockdowns, social distancing, mask wearing, and travel restrictions. While these steps were crucial ... University of Oxford Medical Xpress

...once restrictions were lifted, countries saw cases of flu surge dramatically. The phenomenon has been called the "immunity debt," where populations become more susceptible to infections after extended periods of reduced exposure. While the hypothesis was widely accepted, until now there has been little evidence to back up the theory.

...