Class 12 Biology Human Health Disease Viral diseases

Viral diseases

Common cold

  • Caused by Rhino virus.
  • Affects nose and respiratory organs.
  • Transmitted by direct inhalation of droplets from cough and sneeze of infected person, through contaminated objects like pen, books, cups etc.
  • Nasal congestion and discharge, sore throat, hoarseness, cough are common symptoms.

Fig. Rhino virus  

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