A meat-processing plant in Germany. A church in Seoul. A squat and a hospital in Italy. A wholesale market in Beijing. All of them have skilled clusters of infections after nationwide authorities declared the illness suppressed of their nation and launched a sluggish return in direction of regular life.
Months into the pandemic, concern of a second wave of infections now hangs over nations which have managed to stamp out the illness, principally by economically and socially painful lockdowns.
An incubation interval of as much as two weeks, the truth that some contaminated folks can unfold the illness earlier than signs present and others stay asymptomatic … all this helps the virus to unfold undetected earlier than an outbreak flares. South Korea grabbed worldwide consideration final week when its illness management authorities have been the primary on this planet to announce that the nation had entered a second wave, centered across the capital and apparently triggered by gatherings over a Could vacation.
The time period “second wave” has no agreed-upon scientific definition. It could possibly imply something from localised spikes in an infection to a full-blown nationwide disaster, and a few consultants keep away from it because of this. The World Health Organization prevented utilizing it to explain South Korea’s standing when requested in a information convention.
There’s extra consensus on each prevention and deal with new outbreaks utilizing approaches honed quickly over the previous few months to search out people who find themselves contaminated, and stop them spreading the illness.