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Middle East respiratory syndrome (MERS) is a viral respiratory infection caused by Middle East respiratory syndrome–related coronavirus (MERS-CoV). [1] Symptoms may range from none, to mild, to severe depending on age and risk level. [6] [1] Typical symptoms include fever, cough, diarrhea, and shortness of breath. [1]
On 16 April 2014, Malaysia reported its first MERS-COV related death. [34] The person was a 54-year-old man who had traveled to Jeddah, Saudi Arabia, together with pilgrimage group composed of 18 people, from 15 to 28 March 2014. He became ill by 4 April, and sought remedy at a clinic in Johor on 7 April. He was hospitalized by 9 April and died ...
After the latency period (but before clinical infection) the infected person can transmit the disease without signs of any symptoms. Such infection is called subclinical infection. Incubation period (also known as the latent period or latency period ) is the time elapsed between exposure to a pathogenic organism, a chemical, or radiation , and ...
Other symptoms are less common among people with COVID-19. Some people experience gastrointestinal symptoms such as loss of appetite, diarrhea, nausea or vomiting. [1] [65] A June 2020 systematic review reported a 8–12% prevalence of diarrhea, and 3–10% for nausea. [2] Less common symptoms include chills, coughing out blood, diarrhea, and rash.
[9] [10] Common symptoms include fever, sore throat, red tonsils, and enlarged lymph nodes in the front of the neck. A headache and nausea or vomiting may also occur. [11] Some develop a sandpaper-like rash which is known as scarlet fever. [2] Symptoms typically begin one to three days after exposure and last seven to ten days. [2] [3] [11]
Research has linked camels, showing that the coronavirus infection in dromedary camel calves and adults is a 99.9% match to the genomes of human clade B MERS-CoV. [42] At least one person who has fallen sick with MERS was known to have come into contact with camels or recently drank camel milk. [43]
Human infectious diseases may be characterized by their case fatality rate (CFR), the proportion of people diagnosed with a disease who die from it (cf. mortality rate).It should not be confused with the infection fatality rate (IFR), the estimated proportion of people infected by a disease-causing agent, including asymptomatic and undiagnosed infections, who die from the disease.
Clinicians often also make treatment decisions based on the person's signs and symptoms alone. In the US, approximately two-thirds of adults and half of children with sore throat are diagnosed based on symptoms and do not have testing for the presence of GAS to confirm a bacterial infection. [2]