Is a second wave of COVID-19 expected to occur?
It largely depends on the SARS-CoV-2 seroprevalence developed in each
country, which is still unknown. Countries that have had widespread
transmission may be hit by a second wave, but presumably with less
severe consequences. Countries that effectively controlled the pandemic
are at a higher risk of second wave of COVID-19 if those effective
controls are relaxed due to the limited viral transmission and lack of
active immunization.