introduction / bringing in / leading in / installation
136295
polio
37916
young child / infant
102603
un- / non- / negative prefix
147491
living / life
60253
action of making something / -ification
53812
vaccine (ger: Vakzin)
43936
first / new
100900
death / mortality
91242
custom / practice / habit / usual
167042
report / information
154056
welfare / public welfare / social welfare
80458
Ministry of Labour (now Ministry of Health, Labour and Welfare)
168214
consideration / examination / investigation / study / scrutiny / discussion
74982
meeting / assembly / party
56790
report / information
154056
subject / contents / matter / substance / detail / import
138043
close investigation / careful examination
112857
result / consequence / outcome / effect
74034
vaccine (ger: Vakzin)
43936
safety
45245
nature (of a person)
111293
serious / important / significant / grave / weighty
99472
worry / fear / anxiety / concern
74850
present point (i.e. in history) / at the present time
76580
interaction / correspondence / coping with / dealing with / support
122220
necessary / needed / essential / indispensable
146484
opinion / point of view
75489
coincidence / agreement / union / match
47851
thickness
80435
labor / labour / toil / trouble / pains / work / effort / striving
168146
ministry / department
103744
vaccine (ger: Vakzin)
43936
safety
45245
nature (of a person)
111293
serious / important / significant / grave / weighty
99472
worry / fear / anxiety / concern
74850
polio
37916
un- / non- / negative prefix
147491
living / life
60253
action of making something / -ification
53812
thickness
80435
labor / labour / toil / trouble / pains / work / effort / striving
168146
ministry / department
103744
consideration / examination / investigation / study / scrutiny / discussion
74982