Vaccines typically require an average development period of 10 years, with only 6 out of 100 vaccines reaching the commercialisation stage .
The COVID-19 pandemic has set in motion an unprecedented search for solutions, creating potential for accelerated vaccine development as well as new challenges.
Global investment in COVID-19 exceeds historical records. More than 250 candidates are in the race to develop a vaccine, proposing an exceptional number of novel technologies. More than 50 candidates have already started tests in humans. A few candidates plan to deliver a vaccine before the end of 2020.  
 COVID-19 vaccine development pipeline gears up. A Mullard. The Lancet, Vol 395, June 6, 2020.
 On pins and needles : Will COVID-19 vaccines ‘save the world’?. McKinsey & Company, July 2020.
 Coronavirus: Tout comprendre sur les différents vaccins en développement. N Viudez. Industrie pharma, 16 avril 2020.