Download NAME: DATE: PERIOD: ______ VIRUS SPREAD SIMULATOR I. 1

NAME: ____________________________ DATE: __________________
PERIOD: _____________
VIRUS SPREAD SIMULATOR
I.
1) Go to website-- http://www.washingtonpost.com/wp-srv/special/health/how-ebola-spreads/
2) Slide the day indicator toggle bar near the top of the page (next to the boxes that indicate colors for newly infected,
recovered & deaths) to day 1. This represents the day one person was infected with each of the viral diseases listed in
the tables below
3) Slide the indicator to the days indicated in the tables and record the number of people infected and number of deaths
for each disease for each of the days. Answer the questions that follow.
Days
Elapsed
1
10
20
30
40
50
60
70
Days
Elapsed
1
10
20
30
40
50
60
70
EBOLA
People
Infected
1
Number of
Deaths
MEASLES
People
Infected
1
Number of
Deaths
Days
Elapsed
1
10
20
30
40
50
60
70
Days
Elapsed
1
10
20
30
40
50
60
70
SMALLPOX
People
Number of
Infected
Deaths
1
FLU
People
Infected
1
1) How many days did it take for each of these diseases to affect 100 people?
Ebola SmallpoxMeasles-
Number of
Deaths
Flu-
2) Based on your answers to question #1, rank the diseases (ebola, smallpox, measles and flu) from most to
least contagious (how easy it is to catch and spread the disease).
3) How many of the 100 people infected did each of the diseases eventually kill (this number represents the
percentage of people killed by the disease)? Convert this percentage to a decimal by dividing it by 100.
Ebola:
________%
(decimal) ________
Smallpox: ________%
(decimal) ________
Measles: ________%
(decimal) ________
Flu:
________%
(decimal) ________
4) The population of the U.S. is approximately 300 million people. If each disease spread to the entire
population, how many people would each disease kill (multiply 300million by each decimal from question 3)?
Ebola SmallpoxMeaslesFlu-
II. 1) Go to website - http://www.washingtonpost.com/wp-srv/special/health/ebola-effect-on-body/
2) Click on “Stages of Hemorrhagic Fever” arrows and answer the questions below.
Questions:
1) Ebola virus particles occupy an infected person’s ____________ and other bodily fluids, which
can enter another person through the __________, mucous membranes, scratches on the
__________or from a hypodermic needle — not from from the __________ or from insects. The
bodies of people who have died of the disease are highly infectious.
2) Lasts ____ to ____ days, but most often ____ to ____ days before symptoms suddenly appear.
3) The virus attacks ______________cells in the bloodstream, which carry the infection to
the ______________, ______________ and ______________ nodes.
4) Proteins released by immune cells create widespread ______________, which can damage the
tissue lining blood vessels, causing them to leak. When immune cells known
as ______________ are attacked by Ebola, they release proteins that cause coagulation in the
bloodstream, ______________ blood flow to organs such as the liver, brain and kidneys. Red
blood cells break apart when moving through small vessels filled with clots. The ____________
becomes overwhelmed with broken blood vessels. As cells in the liver are destroyed, the blood
loses its normal ability to ____________, exacerbating any internal or external hemorrhaging.
Massive blood loss is not a frequent result of Ebola, but when it does happen, it is usually in the
________________.
5) After five or more days, patients often develop signature signs of an Ebola infection:
a) Bumpy red __________ on the face, neck, torso & arms; __________ can ____________ off.
b) Severe ________________, nausea and __________________.
c) Chest pain, shortness of breath, ________________, confusion, bloodshot eyes, hiccups or
________________.
d) Spontaneous __________________, skin hemorrhages.
e) __________________ from the ____________, ears, nose, ____________ mucus membranes
& rectum.
6) A breakdown of the adrenal glands leads to dangerously low blood ______________. Liver
failure and ________________ often occur. An infected ________________ can cause severe
________________ pain.
7) Fluid accumulates in the ________________. __________________ can cause patients to
________________ infectious ________________ and other bodily fluids.
8) People who die from the disease usually develop severe symptoms early on and die between
days ______ and ______, succumbing to extreme low blood pressure, multi-____________
failure and the shock of severe infection. The death rate can be as high as ________ percent.
In non-fatal cases, patients might have a fever for several days and maybe even a few advanced
symptoms before improving, usually between days six and 11, but full recovery can be a long
process involving inflamed ____________, recurrent hepatitis, bloodshot __________ & psychosis.