From the flu to COVID-19, viruses are a major threat in our everyday lives. In today’s episode of Crash Course Biology, we’ll learn why viruses are like genes in a box, and how they invade and spread between cells. We’ll also discover...

Some experts feared we were in for a "twindemic" during the 2020-2021 flu season. That didn't happen, which might mean that there will be more people susceptible to getting sick this year.

Some experts feared we were in for a "twindemic" during the 2020-2021 flu season. That didn't happen, which might mean that there will be more people susceptible to getting sick this year.

All year long, researchers at hospitals around the world collect samples from flu patients and send them to top virology experts with one goal: to design the vaccine for the next flu season. But why do we need a new one every year?...

How are Viruses Classified?

Vitamin D, Immune System & SARS-CoV-2 (COVID-19) | Mechanism of Vit D Immune Regulation, Overview of Evidence



In this lesson, I discuss the vitamin D its immune system regulation, specifically with regards to...

Pandemics are one of the greatest existential threats facing humanity today. Over the last few centuries, we've seen outbreaks and epidemics kill millions of people. From plague in the 14th century to influenza in the 20th century,...

This nugget describes common viral diseases in detail with respect to their causative agents, symptoms, diagnosis, treatment and methods of prevention.