How do viruses get into the body? | Ask A Biologist
2020年3月23日 · Those without one are called non-enveloped (naked) viruses. How do viruses work? Viruses can’t make new viruses on their own. Instead, they take over cells, and trick the cell into making new viruses. To enter the cell, a virus floats up to, or …
How do viruses get into the body? | Ask A Biologist
2020年3月23日 · Those without one are called non-enveloped (naked) viruses. How do viruses work? Viruses can’t make new viruses on their own. Instead, they take over cells, and trick the cell into making new viruses. To enter the cell, a virus floats up to, or …
Virus - Ask A Biologist
2011年2月16日 · The virus parts come together to make full viruses that escape from the cell. Each new virus can infect another cell, repeating the infection cycle. Proteins on the virus bind to receptors on the outside of a cell (1). Once inside, the virus releases its DNA or RNA into the cell (2) which instructs the cells to build more copies of the virus (3).
Are viruses alive? - Ask A Biologist
2020年3月7日 · When scientists apply this list of criteria to determine if a virus is alive, the answer remains unclear. Because of this, the debate of whether viruses are living or non-living continues. As the understanding of viruses continues to develop, scientists may eventually reach a final decision on this question.
Receptors and Cell Surface Markers | Ask A Biologist
These special protein molecules are called antibodies. Antibodies are Y-shaped molecules. They fit a specific antigen much like a key fits into a lock. Any cell or organism that triggers the immune system into action is called an antigen (and is usually a non-self antigen). Antigens can be germs such as a virus or bacterium.
What Diseases Do Mosquitoes Carry? | Ask A Biologist
[caption caption="Aedes mosquitoes are one of the most dangerous for people. We can avoid many diseases by learning to avoid mosquitoes.
Give It A Shot - Science | Ask A Biologist
The infection death rates for non-pandemic flu were based on the 2018-2019 flu season average cumulative mortality. The vaccination rates for selected cities were based on country rates for each city for H1N1 (2009-2010), as this was one of the highest vaccination years across the globe in the last decade.
Gene Therapy | Ask A Biologist
The Future of Gene TherapyWhen we get sick, we often go to a doctor to find out how to get better. Sometimes the doctor may prescribe medicine to fight off whatever is making us sick, like bacteria or a virus. For more serious illnesses, the doctor may need to perform surgery to remove a dangerous growth or repair a damaged organ.
Does social distancing work? | Ask A Biologist
The reason is that the virus is extremely contagious and deadly. Viruses are non-living, but like the flu, they infect living organisms to spread. The virus that causes COVID-19 spreads easily through the air, and a person may not feel sick for many days while they are unknowingly spreading it to others.
be attacked, and what is foreign, like a virus or a bacterium, that could do us harm and it does need to be attacked. That's a difficult thing to do, and so the immune system has to be pretty complicated in its structure in order to do that. Dr. Biology: As we talked about at the beginning, there are a cast of characters, as I would call