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
November 21, 2025
Nov. 21, 2025 Researchers discovered that the common amino acid arginine can block harmful Aβ aggregation and reduce its toxic effects in Alzheimer’s disease models. In flies and mice, oral arginine lowered plaque levels, reduced inflammation, and improved ...
Nov. 21, 2025 Researchers discovered that chemotherapy can accidentally trigger a stress alarm in immune cells, causing inflammation that damages nerves. Blocking this alarm protected mice from nerve pain and kept their nerves healthier. A drug already being ...
Nov. 21, 2025 A new airflow device from UBC Okanagan engineers traps exhaled aerosols almost immediately, sharply reducing pathogen exposure in indoor spaces. Early simulations suggest it could outperform existing ventilation systems by a wide ...
Nov. 21, 2025 Tiny ingestible spheres filled with engineered bacteria can detect intestinal bleeding by glowing when they encounter heme. Early tests in mice suggest they could become a quick, noninvasive way to monitor gut ...
Nov. 21, 2025 A cutting-edge approach to immunotherapy shows that forcing cancer cells to die through necroptosis can dramatically boost the body's anti-tumor defenses. By combining three existing drugs, scientists reprogrammed malignant B cells so they release ...
Nov. 21, 2025 Researchers found that hot tubs raise core body temperature more effectively than traditional or infrared saunas, leading to stronger boosts in blood flow and immune activity. Only hot-water ...
Nov. 21, 2025 Researchers created a dissolvable microneedle patch that delivers IL-4 directly to damaged heart tissue, jump-starting repair after a heart attack. The targeted approach shifts immune cells into a healing mode while improving communication between ...
Nov. 20, 2025 Researchers uncovered a powerful weakness in lung cancer by shutting down a protein that helps tumors survive stress. When this protein, FSP1, was blocked, lung tumors in mice shrank dramatically, with many cancer cells essentially triggering their ...
Nov. 20, 2025 Researchers have recreated a miniature human bone marrow system that mirrors the real structure found inside our bones. The model includes the full mix of cells and signals needed for blood production and even maintains this process for weeks. It ...
Nov. 20, 2025 A nationwide analysis has uncovered how sprawling fossil fuel infrastructure sits surprisingly close to millions of American homes. The research shows that 46.6 million people live within about a mile of wells, refineries, pipelines, storage sites, ...
Nov. 20, 2025 Researchers discovered a way to keep T cells from wearing out during the fight against cancer, and the approach could make immune-based treatments far more powerful. They found that tumors use a particular molecular signal to weaken T cells, and ...
Nov. 19, 2025 Scientists have developed a new molecule that breaks down beta-amyloid plaques by binding to excess copper in the brain. The treatment restored memory and reduced inflammation in rats, while also proving non-toxic and able to cross the blood–brain ...
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Nov. 19, 2025 Researchers discovered that chronic inflammation fundamentally remodels the bone marrow, allowing mutated stem cell clones to quietly gain dominance with age. Reprogrammed stromal cells and ...
Nov. 19, 2025 A specially engineered antibody that can infiltrate kidney cysts has shown the ability to block key growth signals driving polycystic kidney disease. Early mouse studies suggest it may halt or even ...
Nov. 18, 2025 Microplastics—tiny particles now found in food, water, air, and even human tissues—may directly accelerate artery-clogging disease, and new research shows the danger may be far greater for males. ...
Nov. 18, 2025 Scientists are uncovering how GLP-1 drugs like Ozempic and Wegovy act on brain regions that control hunger, nausea, pleasure-based eating, and thirst. These discoveries may help create treatments ...
Nov. 18, 2025 Researchers have created one of the most detailed virtual mouse cortex simulations ever achieved by combining massive biological datasets with the extraordinary power of Japan’s Fugaku ...
Nov. 18, 2025 Rutgers scientists found that metformin can blunt many of the metabolic and cardiovascular improvements normally produced by exercise. Participants who took the drug saw reduced gains in fitness, ...
Nov. 18, 2025 Chronic kidney disease has surged to nearly 800 million cases and is now among the top causes of death worldwide. The condition is heavily linked to diabetes, hypertension, and obesity, and often ...
Nov. 18, 2025 Scientists discovered that alcohol activates a sugar-producing pathway in the body, creating fructose that may reinforce addictive drinking. The enzyme responsible, KHK, appears to drive both alcohol ...
Nov. 18, 2025 Scientists are turning venom, radioisotopes, engineered proteins, and AI into powerful new tools against cancer. From Amazonian scorpions yielding molecules that kill breast cancer cells as ...
Nov. 18, 2025 Researchers developed a new nano-micelle formulation, CBD-IN, that finally gets CBD into the brain effectively. In mice, it relieved neuropathic pain quickly and didn’t cause the usual movement or ...