UnitedHealth Group announced that their president, Sir Andrew Witty who is also the CEO of Optum has been asked to co-lead a global effort of the World Health Organization to accelerate the development of a vaccine for COVID-19. Witty will be on a leave of absence from UnitedHealth Group during this time and is expected to return around the end of the year.
https://www.unitedhealthgroup.com/newsroom/2020/2020-04-15-andrew-witty-leave.html