We need to begin shaping a national strategy for next 2-3 years. We're working day/night to meet aspirational goal of 12-18 months for #COVID19 #vaccine, maybe stars will align? But reality is I think world record for a vaccine from start to finish is 4-5 years, usually 10-25 yrs

— Prof Peter Hotez MD PhD (@PeterHotez) April 8, 2020