Polio vaccine payback is still not enough.
Kemp
A
A
D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007351:Insurance, Liability / Q000191:economics*; D008134:Long-Term Care / Q000191:economics; D023321:Poliovirus Vaccines / Q000009:adverse effects*; D013222:State Medicine / Q000191:economics*; D006113:United Kingdom
D023321:Poliovirus Vaccines