div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=cholera-vaccine-cupboard-almost-barehtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Cholera Vaccine: Cupboard Almost Bare loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentssitereader031viewer2022020523575068461a28ab0f07af6657html5thumbnails1jpg width=140 height=200 divp© 1971 Nature Publishing Grouppdiv