Epidemiologist and public health professor Michael Baker used the metaphor of forest brushfires: if a year or two have passed without fire, there is more fuel on the ground to feed the flames. When a fire finally comes, it burns much more fiercely. “What we’re seeing now is we’ve accumulated a whole lot of susceptible children that have missed out on exposure – so now they’re seeing it for the first time,” Baker said.
…“The lack of immune stimulation… induced an “immunity debt” which could have negative consequences when the pandemic is under control and [public health intervientions] are lifted,” the doctors wrote. “The longer these periods of ‘viral or bacterial low-exposure’ are, the greater the likelihood of future epidemics.”