It's no mystery, the methods meant to contain covid would work on any other disease spread in a similar fashion and each disease has a different R0 (rate of reproduction) if flu has fallen below 1 because it has a lower R0 naturally it would begin to disappear, which makes sense as seasonal flu cases have shown to be effected by public service announcements on coughing into one's elbow and washing hands and door handles/knobs where as "covid" is actually a SARS pandemic, SARS was scary nearly 20 years back because it had the same massive mortality rate in it's first weeks that "COVID19" had, we used the exact same treatment in both cases turns out over pressuring a person's lungs with a ventilator is a terrible fucking idea, SARS got contained so treatment methods never developed, "COVID19" got set loose, the chinks probably knew that alternative treatments worked for SARS but refused to tell the world because they wanted the panic. That's why in the first 2 weeks of its appearance in Italy, France, Spain and New York. It had about a 20% mortality rate just like the first SARS outbreak in Asia. In all the scientific literature "COVID19" is refered to as SARS-COV-2, SARS was just SARS-COV. It's a bioengineered SARS virus so of course it has a higher R0 than flu, every country on earth has practically had flu disappear.