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Tonsillitis is inflammation of the tonsils in the upper part of the throat. It can be acute or chronic. [8] [9] [2] Acute tonsillitis typically has a rapid onset. [10] Symptoms may include sore throat, fever, enlargement of the tonsils, trouble swallowing, and enlarged lymph nodes around the neck. [1] [2] Complications include peritonsillar ...
Coronaviruses are a group of viruses known for causing the common cold. They have a halo or crown-like (corona) appearance when viewed under an electron microscope. The common cold is an infection of the upper respiratory tract which can be caused by many different viruses.
Longer-term effects of COVID-19 have become a prevalent aspect of the disease itself. These symptoms can be referred to by many names including post-COVID-19 syndrome, long COVID, and long haulers syndrome. An overall definition of post-COVID conditions (PCC) can be described as a range of symptoms that can last for weeks or months. [83]
Transmission and life-cycle of SARS-CoV-2 causing COVID-19. Coronaviruses vary significantly in risk factor. Some can kill more than 30% of those infected, such as MERS-CoV, and some are relatively harmless, such as the common cold. [49] Coronaviruses can cause colds with major symptoms, such as fever, and a sore throat from swollen adenoids. [91]
Coronavirus diseases are caused by viruses in the coronavirus subfamily, a group of related RNA viruses that cause diseases in mammals and birds. In humans and birds, the group of viruses cause respiratory tract infections that can range from mild to lethal.
Influenza, Human orthopneumovirus (RSV), and human coronaviruses are more prevalent in the winter. 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.
[3] [4] This commonly includes nasal obstruction, sore throat, tonsillitis, pharyngitis, laryngitis, sinusitis, otitis media, and the common cold. [5]: 28 Most infections are viral in nature, and in other instances, the cause is bacterial. [6] URTIs can also be fungal or helminthic in origin, but these are less common. [7]: 443–445
COVID-19 pandemic in the United States. Statistics section. COVID-19 pandemic by country and territory. Flu statistics are often compared to coronavirus statistics. COVID-19 pandemic cases. More statistics for comparison purposes. COVID-19 pandemic deaths. More statistics for comparison purposes. Influenza vaccine; Bird flu; Human flu; Swine ...