In 2021, just months after the first COVID vaccines debuted, concern was growing about an exceedingly rare but sometimes deadly outcome of certain shots. Two related vaccines—one from AstraZeneca and ...

Testosterone is often treated as a marker of health and vigor, especially in men. But new genetic evidence suggests it’s not all good: higher lifelong levels of the hormone may also increase the risk ...

Jenny Graves receives funding from The Australian Research Council. Men tend to lose the Y chromosome from their cells as they age. But because the Y bears few genes other than for male determination, ...