Ma coronaviruses atsopano ndi amtundu wa β.COVID-19 ndi matenda opatsirana pachimake kupuma.Nthawi zambiri anthu amavutika.Pakadali pano, odwala omwe ali ndi kachilombo ka coronavirus ndiye gwero lalikulu la matenda;anthu omwe ali ndi matenda asymptomatic amathanso kukhala gwero lopatsirana.Malingana ndi kafukufuku wamakono wa epidemiological, nthawi yoyamwitsa ndi masiku 1 mpaka 14, makamaka masiku 3 mpaka 7.The waukulu mawonetseredwe monga malungo, kutopa ndi youma chifuwa.Kutsekeka kwa mphuno, mphuno, zilonda zapakhosi, myalgia ndi kutsekula m'mimba zimapezeka nthawi zingapo.

 
Fuluwenza ndi wopatsirana kwambiri, pachimake, tizilombo matenda a kupuma thirakiti.The causative wothandizira matenda ndi immunologically zosiyanasiyana, single-strand RNA mavairasi otchedwa fuluwenza mavairasi.Pali mitundu itatu ya mavairasi a chimfine: A, B, ndi C. Mavairasi amtundu wa A ndiwo amafala kwambiri ndipo amakhudzidwa ndi miliri yoopsa kwambiri.Mavairasi amtundu wa B amatulutsa matenda omwe kaŵirikaŵiri amakhala ocheperapo kusiyana ndi amtundu wa A. Mavairasi amtundu wa C sanagwirizanepo ndi mliri waukulu wa matenda a anthu.Mavairasi amtundu wa A ndi B amatha kuzungulira nthawi imodzi, koma nthawi zambiri mtundu umodzi umakhala wamphamvu panyengo inayake.