The flu didn’t disappear. We just weren’t tracking it. Here is my theory. All “testing” centers the docs would send us to if we were sick were mass nasal swab operations for the corona right? So you get swabbed for the corona when you are sick. Came back either positive or negative but that didn’t change the fact you were still sick if it came back negative. I know a lot Of people who were sick but everytime negative and sent on their way. There isn’t a paper trail of flu because they weren’t testing for the flu. The really sick individuals came back and false positive and there were how many who weren’t even sick with positive I personally know 5 who had zero symptoms but came back positive on a routine test.