Messenger RNA vaccine technology, once an arcane area of research, became household terminology because of the COVID-19 pandemic, and now scientists are working on an mRNA flu vaccine strategy that, at least in this study, ...
Many viruses and bacteria infect humans through mucosal surfaces, such as those in the lungs, gastrointestinal tract and reproductive tract. To help fight these pathogens, scientists are working on vaccines that can establish ...
Sep 25, 2013
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Examination of lung tissue and other autopsy material from 68 American soldiers who died of respiratory infections in 1918 has revealed that the influenza virus that eventually killed 50 million people worldwide was circulating ...
Sep 19, 2011
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A new, Yale-led study suggests that a range of respiratory viral infections—including COVID-19 and influenza—may be preventable or treatable with a generic antibiotic that is delivered to the nasal passageway.
Apr 22, 2024
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Use of antibiotics provided no measurable impact on the severity or duration of coughs even if a bacterial infection was present, finds a large, prospective study of people who sought treatment in U.S. primary or urgent care ...
Apr 15, 2024
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New research from the University of Pittsburgh and UPMC shows that telemedicine visits conducted for children with primary care providers (PCPs) are associated with fewer antibiotic prescriptions than telemedicine visits ...
Mar 19, 2024
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A research team at Freie Universität Berlin has conducted a comprehensive comparison of the efficacy of a mucosal, replication-competent but fully attenuated virus vaccine, sCPD9-ΔFCS, with the monovalent mRNA vaccine BNT162b2 ...
Feb 27, 2024
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Influenza A viruses with induced resistance to a new candidate antiviral drug were found to be impaired in cell culture and weakened in animals, according to a study by researchers in the Center for Translational Antiviral ...
Feb 6, 2024
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New UCLA-led research finds that infants born full term to mothers who were infected with COVID-19 during pregnancy had three times the risk of having respiratory distress compared with unexposed infants, even though they ...
Jan 24, 2024
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Mayo Clinic researchers mapped how the measles virus mutated and spread in the brain of a person who succumbed to a rare, lethal brain disease. New cases of this disease, which is a complication of the measles virus, may ...
Dec 21, 2023
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In humans the respiratory tract is the part of the anatomy that has to do with the process of respiration.
The respiratory tract is divided into 3 segments:
The respiratory tract is a common site for infections. Upper respiratory tract infections are probably the most common infections in the world.
Most of the respiratory tract exists merely as a piping system for air to travel in the lungs; alveoli are the only part of the lung that exchanges oxygen and carbon dioxide with the blood.
Moving down the respiratory tract starting at the trachea, the tubes get smaller and divide more and more. There are estimated to be about 20 to 23 divisions, ending up at an alveolus.
Even though the cross-sectional area of each bronchus or bronchiole is smaller, because there are so many, the total surface area is larger. This means there is less resistance at the terminal bronchioles. (Most resistance is around the 3-4 division from the trachea due to turbulence.)
This text uses material from Wikipedia, licensed under CC BY-SA
