Measles virus1 Enders’ Edmonston strain (live, attenuated)............ not less than 3.00 log10 TCID50* Mumps virus1 Jeryl Lynn™ (Level B) strain (live, attenuated)....... not less than 4.30 log10 TCID50 Rubella virus2 Wistar RA 27/ 3 strain (live, attenuated)................... not less than 3.00 log10 TCID50 Varicella virus3 Oka/ Merck strain (live, attenuated)........................ not less than 3.99 log10 PFU**