Topic Progress:

Topics Covered:

  1. Definition
  2. Etiology and Epidemiology
  3. Signs and Symptoms
  4. Infection Process

What is Droplet Transmission: Large, short-range aerosols produced by sneezing, coughing, or even talking. Droplets may propel to a range of 3 feet or more.

What is Contact Transmission: Contact transmission is the most common mode of transmission and can transfer from person to person through touching, kissing,biting, feco- oral,transplacental, sexual intercourse, contaminated soil (eg: hookworm). For COVID-19, contact transmission can be accomplished by touching a contaminated surface and then touching the eyes, nose or mouth.

Additional Resources:


For updated information, please visit WHO website: