SARS-CoV-2, the virus that causes Covid-19, affects more than just the lungs and airways. Here's how this virus enters cells ...

Once a virus gets inside of an organism, like a human, it's genetic material allows it to damage or change cells in order to multiply rapidly. And if your immune system can't fight it off ...

You’re invaded by bacteria and viruses at ... for your body…fever is also a strong order to lay down and rest, to save energy ...

but this NOVA Hot Science isn't about the fight against the AIDS virus ... A mumps virus enters the body, then enters a cell. There it makes copies of itself. How does the immune system respond?

How does the body respond to a dengue infection ... called monocytes and macrophages, to fight the virus. Normally, monocytes and macrophages ingest and destroy pathogens, but instead of ...

How does the body respond to a dengue infection ... the body's innate and adaptive immune responses work together to fight the virus. B cells from the immune system produce antibodies that ...