id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
hls-1978	Thayyil, Jayakrishnan; Jayakrishnan, Thejus	Post-polio eradication: vaccination strategies and options for India	2014	5	.pdf	application/pdf	5276	226	50	We searched and reviewed the full text of the available pub- lished literature on polio eradication via PubMed and examined Internet sources and websites of major international health agencies. Considering the threat of vaccine-derived viruses to polio eradication, WHO urged to develop a strategy to safely dis- continue OPV after certification.	cache/hls-1978.pdf	txt/hls-1978.txt