Metodos Matematicos da Fisica

Almost 100 million people all around the World had Covid-19 and almost 26 million still have it. The death toll has exceeded the incredible mark of 2.1 million people. Moreover, Covid-19 continues to infect even at higher rates than before. Many countries are facing new waves of contamination by Covid-19. "Covid-19's ability to infect people is unprecedented."

Based on a linear superposition of hyperbolic tangent functions, a multi-wave analysis is employed to describe Covid-19 case and death data (weekly accumulated) and their growth rates. These curves picture the actual moment of this very serious pandemic.