Puzzle 39: 1950s Medical Milestones

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NFLFAKUBZQMYXAX CUNNXLLEPDYESFE AERMVYTKBNDPADT RVISOLRWNAEOLYN WJENEJADCGLCKPI GMLWOASOBMASVAL HELIXNOHRIBOACL YGQBCTUOHGOHCEI RATIFINSCQRTCMC EDCSUBDPRZAEIAI GNHQDIXIAPTTNKN RAUOHOGTEMOSEEE UBYPRTCASYRLQRP STDXWIWLENYZITI KHWXZCBORSJMIOA
1.
SALKVACCINE
2.
PENICILLIN
3.
POLIO
4.
PACEMAKER
5.
ULTRASOUND
6.
DNA
7.
HELIX
8.
ANTIBIOTIC
9.
RESEARCH
10.
STETHOSCOPE
11.
HOSPITAL
12.
LABORATORY
13.
SURGERY
14.
BANDAGE
15.
NURSE