But the vaccine has been known to
cause occasional outbreaks, presumably because the procedure used to kill the virus is imperfect.
The embrace of openness has survived, in spite of
occasional outbreaks of anti-immigrant sentiment, for the intervening two and a half centuries.
Virology is being constantly challenged
with occasional outbreaks of hazardous viral infections, occurrence of newly emerging viruses and persistent infections.
And as we have come to expect, the meeting was marked by rhetoric, repetition, and
occasional outbreaks of fibbing.
The trade union movement was neutered and remains so today with
the occasional outbreak of strike action.