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Signs and symptoms depend on if the febrile seizure is simple versus complex. In general, the child's temperature is greater than 38 °C (100.4 °F), [4] although most have a fever of 39 °C (102.2 °F) or higher. [6] Most febrile seizures will occur during the first 24 hours of developing a fever. [6]
The temperature reading depends on which part of the body is being measured. The typical daytime temperatures among healthy adults are as follows: Temperature in the rectum (rectal), vagina, or in the ear (tympanic) is about 37.5 °C (99.5 °F) [20] [medical citation needed] Temperature in the mouth (oral) is about 36.8 °C (98.2 °F) [12]
Adult and pediatric manifestations for the same disease may differ; for instance, in COVID-19, one metastudy describes 92.8% of adults versus 43.9% of children presenting with fever. [ 14 ] In addition, fever can result from a reaction to an incompatible blood product.
Chills is a feeling of coldness occurring during a high fever, but sometimes is also a common symptom which occurs alone in specific people. It occurs during fever due to the release of cytokines and prostaglandins as part of the inflammatory response, which increases the set point for body temperature in the hypothalamus.
Gastrointestinal symptoms may also occur, including nausea, vomiting, diarrhea, [11] and gastroenteritis, [12] especially in children. The standard influenza symptoms typically last for two to eight days. [13] Some studies suggest influenza can cause long-lasting symptoms in a similar way to long COVID. [14] [15] [16]
What Are the Symptoms of RSV in Older Adults? Symptoms of RSV can range from mild to severe. Dr. Elizalde says that mild RSV symptoms can include a runny nose, sore throat, coughing, sneezing and ...
Symptoms begin with a three to six-day febrile illness. [4] [5] During this time, temperatures can peak above 40 °C and children can experience increased irritability with general malaise. [5] Many children in the febrile phase feel well, engaged, and alert. For these patients, fever is usually diagnosed incidentally. [5]
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