Define epidemics and highlight its characteristics and causes
An epidemic is the rapid spread of infectious disease to a large number of people in a given population within a short period of time, usually two weeks or less. For example, in meningococcal infections, an attack rate in excess of 15 cases per 100,000 people for two consecutive weeks is considered an epidemic.
Epidemics of infectious disease are generally caused by several factors including a change in the ecology of the host population (e.g. increased stress or increase in the density of a vector species), a genetic change in the pathogen reservoir or the introduction of an emerging pathogen to a host population (by movement of pathogen or host). Generally, an epidemic occurs when host immunity to either an established pathogen or newly
_____ _________ _____ _________ __________ _________ _________ __________ ____.
_____ _______ ________ ___ ___.
________ ______ ____ ______ _________ _________ _________.
____ _____ _______ _____ ___ ____ __________ __________.
_____ __________ ____ ________ ________ _____ ______ _________ __________ ___ ___.
__________ ___ _______ _____ ____ ______.
_________ __________ ________ _________ ______ __________ ______.
_____ ______ ________ ______ _________ __________.
_________ ____ ___ ________ ________ ________ _______ ___ _____ _____ _____.
__________ ___ ________ ________ _______ _______ _____ _______ _________ __________ _________ ____.
_______ ___ ________ ______ _________ ____ ___ _________.
__________ ___ ________ ____ _________ __________.
_________ _________ ________ _____ ______ ______ _______ __________ ___ _____ __________.
____ ________ _________ ________ ______ _________ ________ _______ ______.
____ _____ __________ __________ _________ __________ __________ ____ ______ _____.
______ _________ __________ __________ __________ _________.
_______ ____ ___ __________ ________ _____ __________ ______ _________ ____ ___.
_________ ______ __________ __________ ______ _______ _____ _____ _____ ________ __________ _____.
_________ ____ ____ _______ __________ __________ _____ ___ _____ ________ ________.
___ __________ ___ ______ ___ _____ _________ ______ _________ _______.
___ ___ _________ ________ ______ ____ __________ ___.
_______ ____ __________ _________ _____.
___ _________ _________ ___ __________ ________ _____ ______ ________.
________ _____ __________ ____ _______ ________.
- Solved Assignments
- Study Notes
- Guess Papers
- Question Papers
✓ Unlock up to 60% of the answer
✓ No payment required