<prompt> Unda tweet inayotoa muhtasari wa athari za janga la COVID-19.  <response>: Janga la COVID-19 limezua usumbufu ambao haujawahi kushuhudiwa duniani, na kusababisha mamilioni ya watu kupoteza maisha, kudhoofisha uchumi, na kubadilisha kimsingi jinsi tunavyoishi na kufanya kazi. COVID19 janga 