1940 मायथाइनिफ्राइनो बुहुमाव जयै डि. टि. पि. टिकाखौ बाहायबोगासिनो दं आरो बेनि मददजों क्लिनिकेल पर्टयुसिसखौ खम खालामनायाव थोजासे मदद मोनदों ।
Combined DTP vaccines have been used the world over since 1940 itself and great success has been achieved in lessening the clinical pertussis with its help .