Reference Terms
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Sexually transmitted disease
Sexually transmitted diseases (STDs) also known as sexually transmissible diseases, sexually transmitted infections (STIs) or (infrequently) venereal diseases (VD), are diseases or infections that have a significant probability of transmission between humans by means of sexual contact. Depending on the STD, a person may or may not still be able to spread the infection if no signs of disease are present. For example, a person is much more likely to spread herpes infection when blisters are present (STD) than when they are absent (STI). However, a person can spread HIV infection (STI) at any time, even if he/she has not developed symptoms of AIDS (STD).
All sexual behaviors that involve contact with another person or the bodily fluids of another person should be considered to contain some risk of transmission of sexually transmitted diseases.
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Health & Medicine News
October 23, 2025
Oct. 23, 2025 — Cedars-Sinai researchers created “young” immune cells from human stem cells that reversed cognitive decline and Alzheimer’s symptoms in mice. The treated animals showed better memory and healthier brain structures. The cells seemed to protect ...
Oct. 23, 2025 — McMaster researchers found that deep abdominal and liver fat can quietly damage arteries, even in people who appear fit. Their MRI-based study of over 33,000 adults shows these fats are closely ...
Oct. 23, 2025 — MIT scientists have found that an amino acid called cysteine can help the gut heal itself. In mouse studies, a cysteine-rich diet activated immune cells that release a molecule speeding up tissue repair in the small intestine. This process helped ...
Oct. 22, 2025 — Texas A&M researchers found that in an aggressive kidney cancer, RNA builds “droplet hubs” that activate tumor genes. By creating a molecular switch to dissolve these hubs, they stopped cancer growth in lab and mouse tests. The work reveals how ...
Oct. 22, 2025 — Researchers have developed a DNA-based therapy that targets the PCSK9 gene to lower cholesterol naturally. Using polypurine hairpins, they increased cholesterol uptake by cells and reduced ...
Oct. 22, 2025 — Researchers at King’s College London have created the first evidence-based dietary guidelines for chronic constipation, finding real relief may come from kiwifruit, rye bread, and mineral water. Psyllium, probiotics, and magnesium oxide also ...
Oct. 22, 2025 — A wireless eye implant developed at Stanford Medicine has restored reading ability to people with advanced macular degeneration. The PRIMA chip works with smart glasses to replace lost photoreceptors using infrared light. Most trial participants ...
Oct. 22, 2025 — Scientists have uncovered a toxic alliance between Aβ and fibrinogen that may explain how Alzheimer’s disease begins. The two proteins together create stubborn clots that damage blood vessels and spark inflammation in the brain. These effects ...
Oct. 22, 2025 — A study found that daily vitamin D supplements helped slow telomere shortening—the cellular process linked to aging and disease. Researchers believe its anti-inflammatory effects may protect DNA. ...
Oct. 21, 2025 — New research reveals that exercise counteracts the mood-damaging effects of a Western-style diet through specific gut and hormonal mechanisms. Running restored metabolites tied to mental well-being and balanced key hormones like insulin and leptin. ...
Oct. 21, 2025 — A powerful new drug combination—niraparib added to standard prostate cancer therapy—has been shown to significantly delay disease progression in men with specific DNA repair gene mutations. In the large AMPLITUDE trial, patients receiving the ...
Oct. 21, 2025 — Mizzou scientists are exploring how a ketogenic diet may protect the brain and prevent Alzheimer’s in people genetically predisposed to it. Their study found that female mice with the APOE4 gene benefited most, showing improved gut and brain ...
Latest Headlines
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Oct. 21, 2025 — Scientists from the University of Exeter has developed a precise method to interpret ankle blood pressure readings—an innovation that could transform care for people unable to have their arm blood ...
Oct. 21, 2025 — Menopause brings profound shifts not just in hormones but in the very structure of the brain. Scientists have found that gray matter in regions tied to memory and thinking can shrink, while white ...
Oct. 21, 2025 — Interval running condenses the powerful effects of regular running into shorter, high-intensity bursts. Research shows it can improve cardiovascular health, regulate blood sugar, and reduce body fat ...
Oct. 21, 2025 — Researchers discovered that avian influenza (H5N1) can survive in raw milk cheese made from contaminated milk, even after the 60-day aging process required by the FDA. However, highly acidic cheeses ...
Oct. 21, 2025 — Scientists at UCSF have uncovered evidence that multiple sclerosis silently damages the brain years before diagnosis. By studying proteins in blood samples, they identified early immune signals and ...
Oct. 20, 2025 — Neck size is proving to be a powerful indicator of hidden health risks. Larger neck circumferences are associated with cardiovascular disease, diabetes, and sleep apnea, even among those with normal ...
Oct. 20, 2025 — A massive brain imaging study of nearly 30,000 people has uncovered striking connections between eating ultra-processed foods and measurable changes in brain structure. These changes may be tied to ...
Oct. 20, 2025 — A new light-driven cancer therapy uses LEDs and tin nanoflakes to kill tumors safely and affordably. Developed by teams in Texas and Portugal, it ...
Oct. 20, 2025 — Researchers found that pembrolizumab, an immune-activating cancer drug, lowered the risk of distant metastases in patients with Merkel cell carcinoma after surgery. Though recurrence rates overall ...
Oct. 20, 2025 — A groundbreaking retinal implant called PRIMA has enabled blind patients with dry AMD to read again. The chip, powered by light and paired with AR glasses, sends visual data directly to the brain. In ...