Diseases, Conditions, Syndromes

Tuberculosis spread 'depends on moisture in the air'

Climatic factors such as dew point temperature, relative humidity and atmospheric temperature that affect water droplet formation are crucial for the survival and spread of tuberculosis (TB), an airborne infectious disease, ...

Biomedical technology

A gel-based sensor that detects wound infections

A team of researchers affiliated with a large number of institutions in Singapore has developed a gel-based sensor that can be used to detect infections in open wounds. In their paper published in the journal Science Advances, ...

Diseases, Conditions, Syndromes

Droplets with coronaviruses last longer than previously thought

It is easier to get infected in winter than in summer—this is true for the Corona pandemic, for influenza and for other viral diseases. Relative humidity plays an important role in this. Outdoors, it is much higher outside ...

Health

Researcher examines extreme heat, multiple sclerosis link

Public health scientist Naresh Kumar found that clinical visits by multiple sclerosis patients to Veterans Affairs medical centers increased during months associated with warmer weather and high humidity. With sweltering ...

Medical research

Seasonality of COVID-19 confirmed

As the novel coronavirus has raced around the world, experts have wondered whether it would behave like influenza and other respiratory viruses, spiking in the winter and abating in the summer. Now, more than a year into ...

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Humidity

Humidity is a term for the amount of water vapor in the air, and can refer to any one of several measurements of humidity. Formally, humid air is not "moist air" but a mixture of water vapor and other constituents of air, and humidity is defined in terms of the water content of this mixture, called the Absolute humidity. In everyday usage, it commonly refers to relative humidity, expressed as a percent in weather forecasts and on household humidistats; it is so called because it measures the current absolute humidity relative to the maximum. Specific humidity is a ratio of the water vapor content of the mixture to the total air content (on a mass basis). The water vapor content of the mixture can be measured either as mass per volume or as a partial pressure, depending on the usage.

In meteorology, humidity indicates the likelihood of precipitation, dew, or fog. High relative humidity reduces the effectiveness of sweating in cooling the body by reducing the rate of evaporation of moisture from the skin. This effect is calculated in a heat index table, used during summer weather.

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