Measles virus1 Enders’ Edmonston strain (live, attenuated).................. not less than 3.00 log10 CCID50* Mumps virus1 Jeryl Lynn™ (Level B) strain (live, attenuated)............. not less than 4.30 log10 CCID50* Rubella virus2 Wistar RA 27/ 3 strain (live, attenuated)......................... not less than 3.00 log10 CCID50* Varicella virus3 Oka/ Merck strain (live, attenuated).............................. not less than 3.99 log10 PFU**