A baby comes into the clinic with the following symptoms. What is a likely illness that he/she has.
-Irritability, poor feeding
-Fever (in young infants the temperature may actually be below normal)
-Severe headache (older children)
-Nausea and vomiting
-Stiff neck or pain in neck when flexed
-Pain in back when neck is flexed foreward and chin brought toward chest (older children)

a. mumps
b. Covid
c. measles
d. Meningitis