Immunology

There are many hypotheses about genetic advantages of sexual reproduction but none have been proven in humans.

The researchers of a new study say they have done so, showing how humanity’s predispositions to disease gradually decrease the more we mix our genetic material together. That's right, sex leads to less disease, at least for a species. Obviously sleeping around individually is going to get you sent to a clinic. 

The bacteria living in your gut have more to do with your immune system than you might think. Shutterstock

Your intestines are home to many different kinds of bacteria (and some non-bacterial organisms as well). Together they’re called the “gut microbiome.”

They come from the food you eat – and whatever else gets into your mouth. Bacteria start colonizing your gut at birth.

In this century, vaccine denial is primarily located in progressive hotbeds of states like California, rooted in distrust of science. It's an embarrassment for Democrats, who pride themselves on being more scientific than Republicans, to see that right-wing states like Mississippi and Alabama have negligible exemption rates while supposedly more educated places like California, Washington and Oregon lead the charge in bringing back dangerous infectious diseases.

Don't look so worried Cromwell, she's just asleep. BBC/Company Productions Ltd

By Derek Gatherer, Lecturer at Lancaster University.

In the first episode of BBC historical drama Wolf Hall, based on Hilary Mantel’s novel of the same name, Thomas Cromwell returns home to find his wife and two daughters have all died during the night, victims of a pestilence – the “sweating sickness” – that is scything through the Tudor world.

Skin provides an essential protective barrier against foreign materials and pathogens and helps the body retain various fluids and electrolytes. When that barrier is damaged, the consequences can be devastating. Ulcers, bleeding and bacterial infections may result and the chances of these occurring increases the longer wounds remain open. 

Fortunately, epithelial cell sheets are self-repairing. The moment the integrity of the barrier is compromised, cellular mechanisms are initiated to close the gap. Cells begin crawling forward, and contractile cables are formed in the cells surrounding the wound to help pull the gap closed.

Bird flu: Livestock and farmers most at risk. Shutterstock

By Derek Gatherer, Lancaster University

By Joel N. Shurkin, Inside Science

(Inside Science) - In nature — the rule goes — everything is connected to everything else, so it is possible that when you combine two methods of preventing a deadly disease, bad things can happen.


There are up to 400 chemical compounds on human skin that could play a role in attracting mosquitoes. sookie, CC BY-SA

By Cameron Webb, University of Sydney

There’s always one in a crowd, a sort of harbinger of the oncoming mosquito onslaught: a person mosquitoes seem to target more than others. What is it about these unlucky chosen few that makes them mosquito magnets?

Some media, such as the New York Daily News and NBC, have reported that the Asian H5N1 strain of highly pathogenic avian influenza has now entered the United States. This is incorrect and they were told it was not the same strain by the United States Geological Survey and then suggested it was anyway.

There was avian flu that was recently found, in a green-winged teal in Washington state, but it is a different strain and is not known to harm humans nor has it been found in domestic poultry. 
If you are in the United States and travel to Mexico, you are cautioned not to drink the water, just like if you travel to Taiwan or China you are cautioned not to eat chicken bought from a street vendor; people are immune to some nasty stuff you probably are not.

Getting diarrhea in Mexico is called Montezuma's revenge - it means the natives are still getting back at the Spanish 500 years later and the rest of the world is thrown in for good measure. But it doesn't just end there. Taking antibiotics for diarrhea may put travelers visiting developing parts of the world at higher risk for contracting superbugs and spreading drug-resistant bacteria to their home countries.