8.L.1.2: UNDERSTANDING DISEASE OUTBREAKS

By: Cristopher Alvarado, Sergio Fierros, and Camilo

Arias

ESSENTIAL QUESTION Explain the difference between

epidemic and pandemic as it relates to the spread, treatment, and prevention of disease.http://app.discoveryeducation.com/player/view/assetGuid/8E5F7D1B-1DA1-4439-9390-02C5E01AD48C

http://app.discoveryeducation.com/player/view/assetGuid/1C65DDC1-20FD-48D4-B50E-187EDE5BB89E

DISEASE OUTBREAKS An event that occurs when a disease

spreads in greater numbers than expected.

The two types of disease outbreaks are epidemic and pandemic.

EPIDEMIC A disease that spreads in a certain region.

Lower number of people affected (than pandemic).

Smaller region affected (than pandemic). Ex: Malaria that spreads in a region in

Africa; Swine flu that spreads from Mexico to North America.

PANDEMIC An epidemic that affects the global

population. Higher number of people affected (than

epidemic). Larger region affected. (Usually global) Ex: Malaria - Africa → rest of the world;

Swine - Mexico → New Zealand, Israel, Scotland, and etc.

INFLUENZA PANDEMICS An influenza pandemic occurs when: A new

subtype of virus arises. New viruses may cause a pandemic due to:

Unprepared immune systems Easy transmission/spreading Affects different parts of the world at

different times. Rate of Infection: 6 to 9 months to spread

globally. (Even faster with air travel.)

EXAMPLES OF DISEASE OUTBREAKS The Spanish Influenza killed 40-50 million

people. (1918) The Asian Influenza killed 2 million people.

(1957) Hong Kong influenza killed 1 million

people. (1968)• Severe acute respiratory syndrome (SARS) killed

800 people globally.

TREATMENT AND PREVENTION Antibiotics – treat diseases caused by

bacteria. Vaccines – create immunity against

viruses. Good Hygiene – prevent spread of

germs and bacteria.

THANK YOU FOR WATCHING!!!! Credits:o Cristopher Alvarado - Writing/

Presentationo Sergio Fierros – Pictures/ Videos/

Presentationo Camilo Arias – Pictures/ Videos/

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