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
August 16, 2025
Aug. 16, 2025 — A groundbreaking study has found that a simple change in walking style can ease osteoarthritis pain as effectively as medication—without the side effects. By adjusting foot angle, participants reduced knee stress, slowed cartilage damage, and ...
Aug. 15, 2025 — Arizona State University scientists have unveiled NasRED, a revolutionary one-drop blood test that can detect diseases like COVID-19, Ebola, HIV, and Lyme with incredible speed and precision. Using gold nanoparticles to spot microscopic disease ...
Aug. 14, 2025 — Cats can naturally develop dementia with brain changes strikingly similar to Alzheimer’s disease in humans, including toxic amyloid-beta buildup and loss of synapses. A new study shows these similarities could make cats valuable natural models for ...
Aug. 14, 2025 — Scientists in Sweden have developed a groundbreaking “skin in a syringe” — a gel packed with live cells that can be applied directly to wounds or even 3D-printed into skin grafts. Designed to help the body build functional dermis rather than ...
Aug. 13, 2025 — A vigorous workout can spark anti-cancer proteins, cut cancer cell growth, and help survivors fight recurrence by reducing inflammation and improving body ...
Aug. 13, 2025 — Cambridge scientists have cracked the mystery of why cuff-based blood pressure monitors often give inaccurate readings, missing up to 30% of high blood pressure cases. By building a physical model that replicates real artery behavior, they ...
Aug. 12, 2025 — THC levels in cannabis have soared in recent years, raising the risk of psychosis—especially in young, frequent users. Studies reveal a strong connection between cannabis-induced psychosis and schizophrenia, making early cessation and treatment ...
Aug. 12, 2025 — Scientists have found protein fragments from the COVID-19 virus hidden inside tiny cellular packages in the blood of long COVID patients, offering the first potential measurable biomarker for the ...
Aug. 12, 2025 — A study finds that people are more open to plant-based eggs when they’re part of familiar foods, like pancakes, rather than served plain. While taste and appearance still favor regular eggs, vegan eggs score higher on environmental and ethical ...
Aug. 12, 2025 — A six-month randomized trial challenges the idea that eating more sweet foods increases a person’s preference for sweetness. Participants on diets with high, low, or mixed sweetness levels showed no changes in their sweet taste preferences, energy ...
Aug. 12, 2025 — Researchers have discovered that parts of the human brain age more slowly than previously thought—particularly in the region that processes touch. By using ultra-high-resolution brain scans, they found that while some layers of the cerebral cortex ...
Aug. 12, 2025 — Scientists have discovered a direct cause-and-effect link between faulty mitochondria and the memory loss seen in neurodegenerative diseases. By creating a novel tool to boost mitochondrial activity in mouse models, researchers restored memory ...
Latest Headlines
updated 12:56 pm ET
Aug. 12, 2025 — Scientists have discovered a parasite that can sneak into your skin without you feeling a thing. The worm, Schistosoma mansoni, has evolved a way to switch off the body’s pain and itch signals, ...
Aug. 11, 2025 — French fries may be more than just a guilty pleasure—they could raise your risk of type 2 diabetes by 20% if eaten three times a week, while the same amount of boiled, baked, or mashed potatoes ...
Aug. 11, 2025 — NASA’s Lunar Trailblazer, a mission designed to create high-resolution maps of water on the Moon, ended after losing contact with the spacecraft just one day after its February 26 launch. Despite ...
Aug. 10, 2025 — Scientists have uncovered a way to promote weight loss and improve blood sugar control without the unpleasant side effects of current GLP-1 drugs. By shifting focus from neurons to brain support ...
Aug. 10, 2025 — Many foods we consume today are ultraprocessed, packed with unhealthy ingredients, and linked to major health risks. As consumption of these foods rises, so do chronic health issues, especially among ...
Aug. 10, 2025 — Ozempic’s weight loss benefits might come at the cost of muscle strength, even if muscle size remains relatively stable. This raises significant ...
Aug. 10, 2025 — Sunniva Kwapeng struggled with lipoedema, a painful condition causing disproportionate fat accumulation, until finally being diagnosed in her 40s. An ...
Aug. 10, 2025 — Researchers at the Salk Institute have used CRISPR to uncover hidden microproteins that control fat cell growth and lipid storage, identifying one confirmed target, Adipocyte-smORF-1183. This ...
Aug. 8, 2025 — Stopping prescription weight loss drugs often leads to significant weight regain, according to a large-scale analysis of 11 global studies. ...
Aug. 8, 2025 — High-fat diets and obesity reshape astrocytes—star-shaped brain cells in the striatum that help regulate pleasure from eating. French researchers discovered that tweaking these cells in mice not ...