2. Muscle Ache and Headaches
One of the first signs of yellow fever to show up after the incubation phase of the virus ends – is muscle ache and headache. As with most other viral infections, symptoms of muscle ache occur due to the body’s immune response fighting off the virus.
When the immune system detects invading pathogens, it ramps up the production of white blood cells to destroy the invading pathogens. Unfortunately, these white blood cells attack healthy tissues in the body as well – resulting in symptoms of muscle ache and headache.
Doctors treat these symptoms as they occur using anti-inflammatories and painkillers to provide relief to the infected individual. In most cases, if yellow fever, these symptoms last around four days to a week before showing signs of subsiding. If the infected individual does not clear the virus due to a weakened immune system, they run the risk of developing the toxic phase of yellow fever.