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Find out about why there is so much excitement about this new therapy, which patients are the best candidates, as well as CAR T-cell effectiveness, safety, and costs.

Discover the science of how viruses can jump from one species to another and the deadly epidemics that can result from these pathogens.

Every year around half a million people in the United States get sick from the bacterium C. diff, often after taking antibiotics. Sound counterintuitive? On Reactions we break down why that happens, and how an unlikely hero could save the day.

Dr. Joshua LaBaer discusses a novel method invented in his lab to identify cancer and how we can use this to save lives of millions of people.

1.8 billion years ago, a cell ate another cell, but it didn't digest it, and without that happening, we would not exist. This week we explore the origins of eukaryotic cells and ask the question, "Are our cells more than ourselves?"

Big and boisterous, Spotigy and Buri appear to be standard 1-year-old bulls. But a quick glance at their furry heads and closer examination of their genes would reveal that they're unique specimens—hornless Holsteins. The bulls are the result of a gene-editing experiment by Alison Van Eenennaam and colleagues at UC Davis, along with researchers at the biotech company Recombinetics, who aim to develop hornless cattle that might one day replace cows whose horns must be physical removed through expensive and painful methods. Van Eenennaam explains how the technique of "precision breeding" can be a faster and more effective means of de-horning cows compared to traditional breeding methods.

Anokhi Jambusaria, M.D., dermatologist at Mayo Clinic in Florida talks about skin cancer.

When wildfires break out on hot, windy days they pose a serious threat to people and the environment. This week on Reactions, learn how we’re using fertilizer to keep dangerous blazes at bay.

Biologist Dan Gibson edits and programs DNA, just like coders program a computer. But his "code" creates life, giving scientists the power to convert digital information into biological material like proteins and vaccines. Now he's on to a new project: "biological transportation," which holds the promise of beaming new medicines across the globe over the internet. Learn more about how this technology could change the way we respond to disease outbreaks and enable us to download personalized prescriptions in our homes.

Watch our step-by-step IHC video protocols to learn how to prepare and stain tissue slides starting from either frozen or paraffin-embedded samples.