viruses, Tiny particles that cause colds, immune system, The body system that fights sickness, symptom, A sign of illness, infect, To make someone sick, reproduce, To make more of the same kind, sneeze, A common cold symptom involving air from the nose, cough, A body action that helps remove mucus, evolve, To change over time, spreading, The action of moving sickness from one person to another.

Leaderboard

Estilo ng visual

Mga pagpipilian

Magpalit ng template

)
Ibalik ng awtomatikong pag-save: ?