I'm going to attempt to implement vaccination guidelines as a health maintenance guideline. For each vaccine there will be a minimum or recommended age to receive the vaccine, and a top age at which you no longer care. So, here's a rule we can call rotavirus 2 months age greaterthan .167 Age lessthan 10 vaccination [ 119 ] which says, the rule applies if the age is greater than .167 years, less than 10 years and needs vaccination type 119 ( CDC code forrotavirus, live, monovalent vaccine)