Immunotherapy scientist and an advisor for 'Covid Act Now' and The National Convalescence Plasma Project, Dr. Leo Nissola joins MSNBC’S host of “American Voices” Alicia Menendez to discuss the new strain of covid-19, the vaccine rollout and the U.K’s decision to space out the time between doses.» Subscribe to MSNBC: http://on.msnbc.com/SubscribeTomsnbc MSNBC delivers breaking news, in-depth analysis of politics headlines, as well as commentary and informed perspectives. Find video clips and segments from The Rachel Maddow Show, Morning Joe, Meet the Press Daily, The Beat with Ari Melber, Deadline: White House with Nicolle Wallace, Hardball, All In, Last Word, 11th Hour, and more. Connect with MSNBC Online Visit msnbc.com: http://on.msnbc.com/Readmsnbc Subscribe to MSNBC Newsletter: http://http://MSNBC.com/NewslettersYouTube Find MSNBC on Facebook: http://on.msnbc.com/Likemsnbc Follow MSNBC on Twitter: http://on.msnbc.com/Followmsnbc Follow MSNBC on Instagram: http://on.msnbc.com/Instamsnbc U.S. Vaccine Distribution Delays Arise As The U.K. Decides To Space Out Time Between Vaccine Doses