Covid vaccine: First ‘milestone’ vaccine offers 90% protection
Good:+ ~90% of individuals achieve immunity.+ no significant side-effects.Not so good:- two doses needed, 3 weeks apart, immunity after one month from first dose. Slow rollout.- -80C storage and transport needed. Challenging, but doable in developed countries, but still may slow down mass rollout. Not feasible in many developing countries.I still wonder about long-term immunity. Anyone can share any insight?