<Tr> <Th> Duration </Th> <Td> 2--4 weeks </Td> </Tr> <Tr> <Th> Causes </Th> <Td> Epstein--Barr virus (EBV) usually spread via saliva </Td> </Tr> <Tr> <Th> Diagnostic method </Th> <Td> Based on symptoms and blood tests </Td> </Tr> <Tr> <Th> Treatment </Th> <Td> Drinking enough fluids, getting sufficient rest, pain medications such as paracetamol (acetaminophen) and ibuprofen </Td> </Tr>

What is the disease of excessive mononuclear leukocytes in the blood