Vaccination

US expects 100 million people vaccinated by February

The US hopes to have immunized 100 million people against COVID-19 by the end of February, a top official said Wednesday, which is approximately 40 percent of the country's adult population.

Diseases, Conditions, Syndromes

Britain OKs vaccine as global COVID death toll nears 1.5 million

Britain on Wednesday became the first western country to approve a COVID-19 vaccine for general use, while Japan and Italy pledged free inoculations for all even as the Americas reported a big surge in cases and the global ...

Other

Scientists use ultraviolet light to disinfect CT scanners

The COVID-19 pandemic has sparked heightened awareness of cleaning and disinfecting procedures in many industries. Health care facilities have long been familiar with protocols for disinfecting tools and equipment, and now, ...

Diseases, Conditions, Syndromes

COVID's collateral damage: Germicidal lamps may damage corneas

In a paper published in the journal of Ocular Immunology and Inflammation, physicians from the Bascom Palmer Eye Institute at the University of Miami Miller School of Medicine reported that several patients using germicidal ...

Psychology & Psychiatry

If you expect an itch, you'll get an itch

If you expect something is going to itch, the itching really does get worse. Leiden health psychologist Danielle Bartels has proved the effect of negative expectations on itching. What's remarkable is that this nocebo effect ...

Medications

US approves Regeneron antibody treatment given to Trump

A COVID-19 antibody therapy used to treat President Donald Trump was approved by the US drug regulator on Saturday for people who aren't yet hospitalized by the disease but are at high risk.

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Light

Light is electromagnetic radiation, particularly radiation of a wavelength that is visible to the human eye (about 400–700 nm, or perhaps 380–750 nm.) In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not.

Three primary properties of light are:

Light, which exists in tiny "packets" called photons, exhibits properties of both waves and particles. This property is referred to as the wave–particle duality. The study of light, known as optics, is an important research area in modern physics.

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