The world is full of microbes and viruses that can get us sick, but we’ve got an Avengers-style defense system ready to take them on. In this episode of Crash Course Biology, we’ll learn about an animal’s immune system, from their skin...

Research suggests there's a reason you can't remember much from your childhood: new memories are replacing the old ones.

Like a common cold or a cold sore, would it be possible to get a reinfection of COVID-19? Would we be able to build up long-term resistance to it?

Two of the vaccines we have for COVID-19 have the distinction of being the first mRNA vaccines to see widespread use in humans. But how do they work, and how are they different from the litany of immunizations you probably got as a kid?

Hank tells us about the team of deadly ninja assassins that is tasked with protecting our bodies from all the bad guys that want to kill us - also known as our immune system.

Like a common cold or a cold sore, would it be possible to get a reinfection of COVID-19? Would we be able to build up long-term resistance to it?

One year to eighteen months might seem like a while to wait for a COVID-19 vaccine, but there's a good reason finding and approving a candidate takes a whole lot of time.

Explore the basics about the immune system with The Amoeba Sisters! This video talks about the three lines of defense and also compares cell-mediated response with the humoral response.

The Rh factor is a protein found on red blood cells; individuals with it are Rh positive, while those without are Rh negative, and it is inherited genetically. Rh incompatibility occurs during pregnancy if an Rh-negative mother carries...

With T cells thoroughly covered, let's move on to B cells and antibodies, which are the central elements of humoral immunity. How do B cells develop? What are antibodies, how many kinds are there, and what do they do? Let's get a quick...

This video is explaining how vaccine works for kids.

Scientists have found that measles is a lot more devastating to the immune system than previously thought. <br/>

This video provides an overview of vaccination, explaining how it triggers an immune response and manufactures memory cells, which enables the body to respond quickly and effectively to a particular pathogen in the future. The video also...

It explains the basic principle of immunisation and explains vaccines. It lists a few diseases against which vaccines are available.

It describes various means by which an individual acquires active and passive immunity.

White blood cells, a.k.a. Leukocytes. These are the second most common cell type in the blood. But what do we know about their structure and what exactly do they do? Well, that’s what we cover in this video.

Antibody Function