For almost a decade, scientists chased the source of a deadly new virus through China’s tallest mountains and most isolated caverns. They finally found it in the bats of Shitou Cave. The virus in question was a coronavirus that caused an...

Did you know that your blood type affects more than just who you can donate blood to?

Grasshopper mice take scorpion venom that could kill a human and use it to numb their pain. What makes these tiny mice so hardcore?

Some countries are planning to wait up to 12 weeks to administer second doses of COVID-19 vaccines. Will this slow the virus?

Scientists are working to develop personalized cancer treatments, but one obstacle in the way is figuring out how different cells react to one another.

We know that our immune system watches out for us, but is there a way we could give it a leg up in spotting cancerous tumors?

Researchers believe you can get reinfected with COVID-19, but we're not quite sure if that's a bad thing yet.

Not everyone who is infected by a cold virus actually shows symptoms. In fact, people who seem to experience symptoms like a sore throat and stuffy nose more often may actually have more robust immune systems!

In the first video in our two part series on HIV and AIDS, we explain how scientists figured out what HIV is, when the infection morphs into AIDS, and where they think the virus originated.

Unlike with many other viruses, once you get a herpesvirus you’re stuck with it for life. But just how do these master trespassers accomplish this feat?

As Numberland's best detective, you thought you'd seen it all. But the desiccated corpses of prominent natural numbers have been showing up all over the city. A lockdown is ordered from sundown to sunrise, and it's still not enough to...

Allergies can already be a bummer, but did you know they can eventually stop you from enjoying your favorite foods?

In this video Paul Andersen explains how immune individuals in a population give the entire group a herd immunity. Concepts of immunity, vaccines, basic reproduction number, and herd immunity threshold are discussed.

Do you remember having a cold in 5th grade? Or the flu a couple years ago? Your immune system does. Our bodies hold many levels of immune defense. Millions of B cells and T cells and antibodies are constantly on patrol for germs and...

In the second video of our two-part series on HIV and AIDS, we look at the challenges that have kept scientists from developing a cure, and the treatments that have still managed to improve the outlook for those infected. Chapters View...

Do We Have to Get Old and Die?

As more and more parents are choosing not to vaccinate their children or are vaccinating them later, diseases like measles are making a comeback. Are vaccines safe? How do vaccines work? Why do some people claim there is a link between...

Paul Andersen explains the importance of genetic variation within a population. He begins with a discussion of the devil facial tumor that is a form of cancer transferred between Tasmanian devils. He then explains how a decrease in...

Throughout this series, and in our real lives, we've seen the chaos and devastation that outbreaks can cause. But there's good news! Eventually, outbreaks come to an end. In this episode, we'll look at some of the important tools of...

(NOTE: This talk was given in 2009, and this field of science has developed quickly since then. Read "Criticisms & updates" below for more details.) Drug-resistant bacteria kills, even in top hospitals. But now tough infections like...

In this video, the teacher explains the role of yeast in bread-making and how fermentation is responsible for creating various tasty foods. The viewers are challenged to identify which food is not created through fermentation, with...

There are many things to keep in mind when choosing your life partner. One such thing is the blood group. We don’t think of this at first, but differences in blood groups can lead to complications. More specifically, these problems can...

If you're interested in public health then infectious disease epidemiology and transmission dynamics is something that you have to get your head around. This video is all about how communicable diseases (those caused by viruses,...

Elevate your health with the antioxidant power of fresh fruits and vegetables! Discover how the unique antioxidant properties in plant-based foods can boost your immune system, slow aging, and combat diseases like cancer. From...