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Airborne pathogens or allergens typically enter the body via the nose, throat, sinuses and lungs. Inhalation of these pathogens affects the respiratory system and can then spread to the rest of the body. Sinus congestion, coughing and sore throats are examples of inflammation of the upper respiratory airway.
An infectious disease agent can be transmitted in two ways: as horizontal disease agent transmission from one individual to another in the same generation (peers in the same age group) [3] by either direct contact (licking, touching, biting), or indirect contact through air – cough or sneeze (vectors or fomites that allow the transmission of the agent causing the disease without physical ...
The symptoms are mostly due to the body's immune response to the infection rather than to tissue destruction by the viruses themselves. [15] The symptoms of influenza are similar to those of a cold, although usually more severe and less likely to include a runny nose. [6] [16] There is no vaccine for the common cold. [3]
Tuberculosis generally affects the lungs, but it can also affect other parts of the body. [1] Most infections show no symptoms, in which case it is known as latent tuberculosis. [1] Around 10% of latent infections progress to active disease that, if left untreated, kill about half of those affected. [1]
The CDC has so far been reluctant to press for such measures, as it updates foundational guidelines on curbing airborne infections in hospitals, nursing homes, prisons, and other facilities that ...
Fungi are a eukaryotic kingdom of microbes that are usually saprophytes, but can cause diseases in humans. Life-threatening fungal infections in humans most often occur in immunocompromised patients or vulnerable people with a weakened immune system, although fungi are common problems in the immunocompetent population as the causative agents of ...
As bird flu infections rise in dairy cattle and chickens, human cases are ticking up too, leaving many people to wonder whether they might be at risk from this recently arrived virus. Bird flu ...
Some infectious diseases can be spread via respiratory droplets expelled from the mouth and nose, as when a person sneezes. A respiratory droplet is a small aqueous droplet produced by exhalation, consisting of saliva or mucus and other matter derived from respiratory tract surfaces. Respiratory droplets are produced naturally as a result of ...
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