Virus
Where Did The Smallpox Virus Come From?
Although a worldwide immunization program eradicated smallpox disease decades ago, small quantities of smallpox virus officially still exist in two research laboratories in Atlanta, Georgia, and in Russia.
How did smallpox spread?
Smallpox patients became contagious once the first sores appeared in their mouth and throat (early rash stage). They spread the virus when they coughed or sneezed and droplets...
How Long Do COVID-19 Patients Continue To Shed The Virus?
In general, reinfection means a person was infected (got sick) once, recovered, and then later became infected again. Based on what we know from similar viruses, some reinfections are expected. We are still learning more about COVID-19.
How does COVID-19 mainly spread?
Spread of COVID-19 occurs via airborne particles and droplets. People who are infected with COVID can release particles and droplets...
Where Did The Polio Virus Come From?
The creation of the man-made polio virus came just a month after the World Health Organization had declared polio eradicated from Europe and projected total eradication of the disease by 2005.
Is polio A virus yes or no?
Poliomyelitis, or simply Polio, is a highly contagious infectious disease caused by three types of poliovirus. The poliovirus is a virus that destroys nervous system causing paralysis.
How...
Is Witches Broom A Virus?
Odd-looking growth called witch’s broom is not harmful — most of the time. With the branches bare, you may notice something odd on a tree or shrub — a dense bunch of twigs growing on a branch. … Parasitic plants, such as dwarf mistletoe, also can lead to witch’s brooms.
What is witches broom disease?
Witches’-broom, symptom of plant disease that occurs as an abnormal brushlike...
How Can Aerosols Transmit The Virus That Causes COVID-19?
A person infected with coronavirus — even one with no symptoms — may emit aerosols when they talk or breathe. Aerosols are infectious viral particles that can float or drift around in the air for up to three hours. Another person can breathe in these aerosols and become infected with the coronavirus.
How far can COVID-19 particles travel in the air?
The new findings support earlier work from researchers...
Where Did The Polio Virus Come From?
The discovery by Karl Landsteiner and Erwin Popper in 1908 that polio was caused by a virus, a discovery made by inoculating macaque monkeys with an extract of nervous tissue from polio victims that was shown to be free of other infectious agents.
How polio virus was created?
Scientists from State University of New York at Stony Brook say they created infectious polio virus in the laboratory from scratch...
Can Epic Games Give You A Virus?
What is so bad about the Epic Games Store you ask? Minimal security. It has existed for a relatively short period of time and there has already been two separate data breaches. Moving around the store is clunky and doesn’t feel as easy as Steam.
Why Epic store is bad?
At launch the store received positive reviews due to it being a strong competitor for Steam, but later it got heavily panned by...
Is Polio A Disease Or A Virus?
The source of reinfection was wild poliovirus originating from Nigeria. A subsequent intense vaccination campaign in Africa, however, led to an apparent elimination of the disease from the region; no cases had been detected for more than a year in 2014–15.
Was polio an airborne virus?
Sometimes poliovirus is spread through saliva from an infected person or droplets expelled when an infected person...