How do vaccines work?

Category: Health
Share:
Download:

The first ever vaccine was created when Edward Jenner, an English physician and scientist, successfully injected small amounts of a cowpox virus into a young boy to protect him from the related (and deadly) smallpox virus. But how does this seemingly counterintuitive process work? Kelwalin Dhanasarnsombut details the science behind vaccines.

You might also like

Microbirth

We look at scientific research that links the way babies are born with health in later life, particularly the increased risk of children developing certain immune-related conditions, including asthma, type 1 diabetes, obesity, cardio-vascular diseases, mental health disorders and even some cancers.

2015 • Health

Food On The Brain

Michael Mosley and James Wong explore the effect that our food has on our most important and, in terms of energy consumption, our greediest organ. It influences our diet by generating cravings for foods such as fat - the most energy-rich food of them all. James heads off to Peru to reveal the surprising link that fat-rich, indulgent chocolate has with breast milk. Sometimes these cravings almost become an addiction - like coffee for example. So we visit a remarkable lab where a team is studying the effect of caffeine on bees and how that may help explain the hold that caffeinated drinks have over us. Together, Michael and James take on some of the hottest chillies on the planet to show what the burn does to our brains. Using the latest imaging techniques and incredibly detailed specialist photography, this is a whole new way of thinking about our relationship with food and the powerful effect it has on our minds.

2017 • The Secrets of Your FoodHealth

The Baby Builders

Inherited genetic diseases are the second most common reason why babies die but people who carry defective genes, such as the ones that cause cystic fibrosis, are being helped by a technique called PGD - pre-implantation genetic diagnosis.

2001 • SuperhumanHealth

The Truth About... Alcohol

A&E doctor Javid Abdelmoneim is on a mission to find out the truth about alcohol. In January, the government released its new alcohol guidelines. For men, the recommended weekly limit was cut by a third to 14 units per week, equivalent to about seven pints of beer, bringing it in line with the amount recommended for women. So what is behind the change? This is just one question of many that Javid aims to answer as he explores the science of drinking and the new evidence for the health risks of alcohol. Why do some people get drunk quicker than others? What is behind red wine's healthy reputation? Is a nightcap actually good for your sleep? Does lining your stomach work? And can alcohol actually make you eat more?

2016 • Health

Trauma Panic and Snoring

Jess hasn't slept properly for 10 years, since she witnessed a traumatic accident. Mike wakes in a panic several times a night. Lisa suffers from epic snoring. Can the experts ease their troubles?

2017 • The Secrets of SleepHealth

Vaccines - Calling the Shots

Diseases that were largely eradicated in the United States a generation ago—whooping cough, measles, mumps—are returning, in part because nervous parents are skipping their children’s shots. NOVA's "Vaccines—Calling the Shots" takes viewers around the world to track epidemics, explore the science behind vaccinations, hear from parents wrestling with vaccine-related questions, and shed light on the risks of opting out.

Health