Prospective of waves during pandemic

01 January 1970 0 3K Report

Why is it that every time there is an epidemic, multiple-wave outbreaks occurred? Why 2nd wave is always devastating?

In 1918 - 3 three successive waves during spring, sumer and winter , 1957- 2 waves, 1968 - 2 waves and most recently in 2009- 2 waves for all most all country but china experienced single wave. Will there is 2nd wave for COVID-19?

Will we witness the Force of Infection again?

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