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Mucociliary clearance has a major role in pulmonary hygiene. MCC effectiveness relies on the correct properties of the airway surface liquid produced, both of the periciliary sol layer and the overlying mucus gel layer, and of the number and quality of the cilia present in the lining of the airways. [3] An important factor is the rate of mucin ...
Despite the high morbidity and mortality rates that resulted from the epidemic, the Spanish flu began to fade from public awareness over the decades until the arrival of news about bird flu and other pandemics in the 1990s and 2000s. [320] [321] This has led some historians to label the Spanish flu a "forgotten pandemic". [177]
The transmission of COVID-19 is the passing of coronavirus disease 2019 from person to person. COVID-19 is mainly transmitted when people breathe in air contaminated by droplets/aerosols and small airborne particles containing the virus. Infected people exhale those particles as they breathe, talk, cough, sneeze, or sing.
The common cold often shares many of the symptoms associated with COVID-19 or the flu but tends to be much milder. You may have a runny nose or congestion, sneezing, sore throat, cough, slight ...
, a registered nurse for 30 years, was heading to Las Vegas for a conference when she noticed a woman in front of her on the airport escalator sneezing. The woman had the best of intentions -- she ...
The COVID-19 pandemic (also known as the coronavirus pandemic and COVID pandemic), caused by severe acute respiratory syndrome coronavirus 2 , began with an outbreak of COVID-19 in Wuhan, China, in December 2019. Soon after, it spread to other areas of Asia, and then worldwide in early 2020.
Pandemics and their ends are not well-defined, and whether or not one has ended differs according to the definition used. As of 28 January 2025, COVID-19 has caused 7,083,856 [1] confirmed deaths, and 18.2 to 33.5 million estimated deaths. The COVID-19 pandemic ranks as the fifth-deadliest pandemic or epidemic in history. (Full article
1918 campaign on the dangers of Spanish flu Ministry of Health poster used during the Second World War, designed by H. M. Bateman. Later film produced in 1945 "Coughs and sneezes spread diseases" was a slogan first used in the United States during the 1918–20 influenza pandemic – later used in the Second World War by Ministries of Health in Commonwealth countries – to encourage good ...