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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 ]
Rhinovirus is the most common viral infectious agent in humans and is the predominant cause of the common cold. The three species of rhinovirus (A, B, and C) include at least 165 recognized types that differ according to their surface antigens or genetics. [1] They are among the smallest viruses, with diameters of about 30 nanometers.
Common, all ages, [3] typically children under 5-years [5] Adenovirus infection is a contagious viral disease , caused by adenoviruses , commonly resulting in a respiratory tract infection . [ 1 ] [ 10 ] Typical symptoms range from those of a common cold , such as nasal congestion , coryza and cough , to difficulty breathing as in pneumonia ...
Exceptions are known to this rule: poxviruses replicate within the cytoplasm and orthomyxoviruses and hepatitis D virus (RNA viruses) replicate within the nucleus. [ citation needed ] Segmented genomes: Bunyaviridae , Orthomyxoviridae , Arenaviridae , and Reoviridae (acronym BOAR).
The virus, which typically causes the common cold, is behind a large wave of illnesses in Los Angeles County, where data show that at least 30% of positive respiratory virus tests have come back ...
Rhinitis is commonly caused by a viral or bacterial infection, including the common cold, which is caused by Rhinoviruses, Coronaviruses, and influenza viruses, others caused by adenoviruses, human parainfluenza viruses, human respiratory syncytial virus, enteroviruses other than rhinoviruses, metapneumovirus, and measles virus, or bacterial ...
Human bocavirus and Human metapneumovirus occur year-round, rhinoviruses (which cause the common cold) occur mostly in the spring and fall, and human parainfluenza viruses have variable peaks depending on the specific strain. Enteroviruses, with the exception of rhinoviruses, tend to peak in the summer. [29]
By contrast, flu cases are skyrocketing. The national share of influenza tests that came back positive rose from around 8% in the week ending Oct. 30 to nearly 15% in the week ending Nov. 13. Flu ...