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91色情片

Discover the latest health news, scientific discoveries and big ideas about the human body and treating diseases, covid-19, diet, fitness, exercise, wellness and how to live a healthy life.

The expression of various genes and proteins (white, red and green) in neurons among mouse brain cells (blue)

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Brain molecule may make us recall memories as being good or bad

A study in mice may help us understand how different people link positive or negative emotions to past events, in a discovery that could help treat post-traumatic stress disorder, anxiety and addiction

Doctor in hospital

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Doctors are concerned about the risk of hospital-acquired covid-19

The covid-19 virus, SARS-COV-2, inside and on top of tunneling nanotubes

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Coronavirus may enter the brain by building tiny tunnels from the nose

Catching the coronavirus after the 34th week of pregnancy may raise the risk of a premature birth seven-fold

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Coronavirus in late pregnancy raises premature birth risk seven-fold

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What lab-grown ‘mini-brains’ are revealing about this mysterious organ

Hormone Replacement Therapy; Shutterstock ID 181675340; purchase_order: -; job: -; client: -; other: -

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Hormone replacement therapy may be safe after breast cancer treatment

Polarised light micrograph of serotonin crystals

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No link between depression and serotonin, finds major analysis

A person takes samples from Marseille sewage water near a retirement home in France to detect covid-19 traces in December 2020

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Sewage surveillance spots new covid-19 variants as effectively as PCRs

NEW YORK, NY - JUNE 08: Passengers wear masks at the subway during rush hour on June 08, 2021 in New York City. New York City's subways are now operating 24-7 as Covid-19 cases have dropped and more Americans receive the vaccination for Covid-19. (Photo by Robert Nickelsberg/Getty Images)

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How to cut your risk of catching the BA.4 and BA.5 covid subvariants

Sign showing temperature of 43掳C.

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Why are heatwaves dangerous and how does extreme heat affect the body?

Extreme heat brings serious health risks, especially for people who are elderly or have pre-existing conditions. Here鈥檚 what you need to know

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What we know so far about how covid-19 affects sperm

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Risk of heart failure may increase with age due to Y chromosome loss

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Modified pig hearts transplanted into dead people kept on life support

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Tiny bubbles in semen could contribute to 鈥榰nexplained infertility鈥�