bearer; carrier; person bearing responsibility; person in charge; supporter
dispersion; separation; scattering; breakup
orphan; person without friends
becoming an issue of public concern; becoming a societal problem
big craze; boom; popular trend; widespread contagion; large outbreak
just now; at this moment; at this point of time
(not) anywhere; nowhere; everywhere; anywhere
smallpox vaccination; inoculation against smallpox
onset of an illness; falling ill
rate; ratio; proportion; percentage
to remain; to abide; to stay (in the one place); to be limited to; to be confined to; to only account for
global scale; worldwide scale
infection; contagion; becoming infected; being infected (e.g. with harmful ideas); being influenced (by)
what is called; what you call; what they call; so-called
condition; term; requirement; qualification; prerequisite
question; inquiry; enquiry
infectivity; infectious capacity; transmissibility
strong; potent; strong; brawny; good (at); skilled; being able to handle
element; component; factor; element (e.g. in array); member (e.g. data structure)
another; one more; even more; (not) quite; (not) very
to accept (e.g. an explanation); to be satisfied (with); to assent (to)
infected person; carrier (e.g. of a virus)
to go out and away; to leave
to fall fast asleep; to be confined to one's bed; to be laid up
touch; contact; contact (with people); dealings; tangency
to sever; to cut off; to suppress; to eradicate; to abstain (from); to give up
you've hit the nail on the head; that's just what I thought; that's exactly like I feel; that's exactly what I think, too
cheap; rash; thoughtless; careless
infectious disease; infection
quite; very; 10^48; quindecillion
for; for the sake of; to one's advantage; because of; as a result of
to move around; to move about; to get around
even so; however; still; whereupon; even though; nevertheless
the past; bygone days; one's past (that one would prefer remained secret); past (tense); preterit; previous life