Estately is more light-hearted in their approach than either Tomotani or MatPat. They use different data points largely drawn from Facebook interests and are not at all rigorous in their modeling.
Still, their chart does have similar useful factors for surviving a zombie apocalypse. However, states with high concentrations of people who play zombie video games had a tactical advantage as well because they understood the enemy. Skip to content Welcome to 'Zedtown' -- an adventure event where competitors play out a zombie apocalypse: people race to reach an evacuation point to ensure their survival, but must also avoid being caught and turned by the 'undead'.
Laurie Vazquez. Strange Maps. Maps can do more than show us places. They also can help determined people find others long lost, whether birth mothers or fugitive killers. Starts With A Bang. The Past. The virions make their way out of the cell, usually destroying it in the process, and then head off to infect more cells. At the core of a virus particle is the genome, the long molecule made of DNA or RNA that contains the genetic instructions for reproducing the virus.
This is wrapped up in a coat made of protein molecules called a capsid, which protects the genetic material. Some viruses also have an outer envelope made of lipids, which are fatty organic molecules.
Soap can dissolve this fatty envelope, leading to the destruction of the whole virus particle. Viruses are like predators with a specific prey they can recognise and attack. Viruses that do not recognise our cells will be harmless, and some others will infect us but will have no consequences for our health.
Many animal and plant species have their own viruses. Bats host many different kinds of coronavirus, one of which is believed to be the source of the novel coronavirus that causes COVID Bacteria also have unique viruses called bacteriophages, which in some cases can be used to fight bacterial infections. Viruses can mutate and combine with one another. Join Now. NCTM Store. Toggle navigation MENU. Log In Not a member? Pandemics: How Are Viruses Spread?
Grade: The spread of a virus is influenced by four factors. Instructions This math simulation models the spread of a virus through social contact. Exploration How Are Viruses Spread?
Here are four factors: the size of the population of opportunity; the number of days contagious; the number of people with whom an infected person comes in contact; and, the probability of contracting the virus from contact with an infected person.
What is a Pandemic? According to the World Health Organization WHO , a pandemic can start when three conditions have been met: a new virus subtype emerges; it infects humans and causes serious illness; and, it spreads easily and sustainably among humans. The History of Pandemics An epidemic is an abnormally high occurrence of a disease in a particular population or geographic area.
How to Minimize the Threat of Pandemic Even as early as , officials knew that contact with infected persons caused the virus to spread. How would quarantine affect the spread? Which parameter population, days contagious, number of contacts, or chance of contraction does it change in the applet? Hold the other variables constant and change only this variable in the applet.
What happens? A medicine is developed that reduces how long infected people are contagious. How would this affect the spread? Which parameter does this medicine influence? A medicine is developed for uninfected people to take that will decrease their likelihood of contracting the disease. Which parameter does this medicine affect in the applet?
Try using the applet again, holding two variables constant. Disease and History, 2nd revised edition. Nobilon International. World Health Organization. Half of the people are accounted for below the point of inflection, and half are accounted for above the point of inflection. Half of the time is accounted for to the left of the point of inflection, and half of the time is accounted for to the right of the point of inflection. Once the point of inflection is known, it is possible to estimate: How long a pandemic will last.
Since half the time occurs to either side of the point of inflection, the point of inflection is the midpoint of the curve. Therefore, if a pandemic has lasted x days in getting to the point of inflection, it will likely continue for another x days. The total number of people that will be infected.
0コメント