Hello and welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice.
If there are a number of persons with the similar symptoms then
leukemia is highly unlikely because this is not contagious and only develop in a few persons in a population.
Ebola is contagious but it is highly unlikely as well since it is a rare condition that has mostly died down recently.
Fatigue can occur with any illness, from a
common cold to more serious illness because the body is using its energy to try and get well.
Headache and rash are also common symptoms, these can also occur with many viral illness. Rash associated with viral illnesses is called
viral exanthem, this normally resolves as the illness improves. Mono is a viral illness and this can be the cause but there are also a lot more viral illnesses that can occur. Most persons improve from mild viral illnesses within 7 to 10 days.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. Michelle Gibson James