knotty challenges
infuriating challenges
logistical problems
right protective gear
right people
right time
huge progress
global shortages
global pandemic
entire people
enforced confinement
massive effort
collective effort
uncontrollable epidemic
catastrophic epidemic
reasonable worst case scenario
downward slope
many reasons
international efforts
comprehensive plan
growing resolve
growing ingenuity
huge amount of work
maximum political consensus
sustained fall
operational challenges
logistical challenges
vast peak
huge alpine tunnel
even bigger mountain
explanatory clip
absolutely vital
collective discipline
absolutely convinced