Transmission of the COVID-19 virus is possible even in the absence of symptoms, while SARS was mainly transmitted by seriously ill patients; therefore, it is much more difficult to contain the spread of COVID-19.
Wagonjwa wa COVID-19 wanasambaza virusi hata wakati hawaonyeshi dalili zozote huku wagonjwa wa SARS wakiwa wanafanya hivyo wakiwa katika hali mbaya sana, jambo linalosababisha ugumu zaidi wa kudhibiti kuenea kwa COVID-19 kuliko SARS.