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The common cold or the cold is a viral infectious disease of the upper respiratory tract that primarily affects the respiratory mucosa of the nose, throat, sinuses, and larynx. [ 6 ] [ 8 ] Signs and symptoms may appear in as little as two days after exposure to the virus. [ 6 ]
Cold temperatures lead to drier air, which may dehydrate mucous membranes, preventing the body from effectively defending against respiratory virus infections. [ 3 ] [ 4 ] [ 5 ] Viruses are preserved in colder temperatures due to slower decomposition, so they linger longer on exposed surfaces (doorknobs, countertops, etc. ).
Cold: Dr. Aashish Didwania, professor of medicine at Northwestern University, tells Yahoo Life that cold symptoms usually develop gradually. “Classic” cold symptoms include runny nose ...
9 1520 Mexico smallpox epidemic: Smallpox 5–8 million 23–37% of Mexican population [12] 1519–1520 Mexico: 10 1957–1958 influenza pandemic: Influenza A/H2N2: 1–4 million – 1957–1958 Worldwide 11 Hong Kong flu: Influenza A/H3N2: 1–4 million – 1968–1969 Worldwide 12 1918–1922 Russia typhus epidemic: Typhus: 2–3 million 1 ...
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 ...
Infectious disease experts remain vigilant for signs of next major outbreak
Rhinovirus is the most common viral infectious agent in humans and is the predominant cause of the common cold. [1] The three species of rhinovirus (A, B, and C) include at least 165 recognized types that differ according to their surface antigens or genetics. [2] They are among the smallest viruses, with diameters of about 30 nanometers.
California's strongest summer COVID wave in two years is still surging, fueled in part by the rise of a particularly hyperinfectious FLiRT subvariant known as KP.3.1.1.