lethargy

He previously revealed in his memoir he had been "going through a bad moment" after he returned, suffering periods of lethargy and "terrifying panic attacks".

Surveillance of the virus is also complicated by the fact that H5N1 infected cows show only subtle signs of infection — lethargy, decreased milk production, etc.

Symptoms include lethargy, vomiting, unusual behavior, seizures, loss of pregnancy and death.

Early warning signs include heavy panting, lethargy, glazed eyes, rapid heartbeat, difficulty breathing, excessive thirst, staggering and bright-red gum color, says DeMel.

Most cases of Oropouche fever are mild, with symptoms such as headache, body pains, nausea, and rash—but the virus can also cause brain inflammation and neurological problems, including vertigo and lethargy.