Infectious
Medical term · I
Conditions which can be passed from person to person by micro-organisms like viruses or bacteria.
Related terms
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BacteriaTiny organisms that may cause certain infections.
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Direct transmissionThe immediate transfer of an infectious agent from a reservoir to a susceptible host by direct contact or droplet spread.
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Herd immunityProtection occurring when so many people in a region are immune to an infectious disease that it can’t spread to others.
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ImmunityProtection against infectious diseases through the action of the immune system. You can become immune to some diseases by catching them. Vaccinations also provide immunity.