Mild illnesses include some cases of the common cold (which have other possible causes, primarily rhinoviruses), while the more lethal types can cause SARS, MERS, and COVID-19.
Magonjwa kali yanajumuisha visa kadhaa vya mafua ya kawaida (ambayo ina sababu zingine zinazowezekana, rhinoviruses) wakati aina mbaya zaidi zinaweza kusababisha SARS, MERS, na COVID-19.