Due to their need for living cells. viruses have developed adaptive evolutionary strategies to survive and perpetuate in reservoir hosts that play a crucial role in the ecology of emerging pathogens. Pathogenic and potentially pandemic betacoronaviruses arose in humans in 2002 (SARS-CoV. disappeared in July 2003). https://www.nacrack.com/flash-find-Orthofeet-Edgewater-Men-s-Athletic-Shoe-hot-choice/