The old vaccines are oddities among the cutting-edge and targeted technologies being developed to combat the novel coronavirus.
- Can old vaccines from science’s medicine cabinet ward off coronavirus? The Washington Post
- Moderna’s coronavirus vaccine to enter final trial stage in July Rappler
- An existing polio vaccine could help protect against coronavirus, top experts say CNN Philippines
- Finding a vaccine for coronavirus is the easy part, the real challenge will be relieving our fears The Independent
- US drugmaker to start final testing stage of coronavirus vaccine in July ABS-CBN News