title: New "4-way" vaccine approved...and do multiple vaccines increase immune problems?
mesh_terms: D019433:Chickenpox Vaccine / Q000009:adverse effects* / Q000276:immunology; D002648:Child; D006801:Humans; D022542:Measles-Mumps-Rubella Vaccine / Q000008:administration & dosage* / Q000009:adverse effects / Q000276:immunology; D017778:Vaccines, Combined / Q000008:administration & dosage / Q000009:adverse effects / Q000276:immunology
chemical_list: D019433:Chickenpox Vaccine; D022542:Measles-Mumps-Rubella Vaccine; D017778:Vaccines, Combined