Regardlessly making noise, it takes 3 years to settle down?

Spanish flu prevailed in 1918 wile the WW-Ⅰ, it spreaded according to the Army movement in Europe resulting over 40,000,000 victims and it lasted as long as 3 years. Though the cause of the disease was not defined at that time, later investigation proved the pathogen as some virus mutant strain. In spite of 100 years researching period of time, we are helpless like an infant, it is true that we can define and analyze the toxicity of the pathogen as SARS CoV-2, but countermeasure for the disaster is not completed even now, although so many research reports are published in the world. As it took us 3 years last time to complete the virus uproar 100 years ago, so the same period time might be required to settle down this time, no matter how we know and prove the pathogen of SARS CoV-2. Natural selection had been done on living things on the Earth not only by climate change and food situation but also by Virus Resistance. Mankind has evolved through Science and Technology to the 21st century, but it's not enough, don't you think?