The worst outbreaks of COVID-19 so far have been in colder parts of the Northern Hemisphere during winter or early spring. Will warmer weather slow the transmission?
Could the Southern Hemisphere see outbreaks intensify as that part of the globe moves into winter?
And is it possible that transmission might be naturally interrupted as it is each year for the seasonal flu?
These are some of the key questions about COVID-19 that scientists are trying to answer.