The global decline in COVID-19 cases can likely be attributed to lockdowns, reduced travel and vaccines, experts say, but new variants may drive another surge.

The novel coronavirus typically attacks the lungs, but there is growing evidence about its effects on another organ -- the brain.

That 20-million figure is likely a "real underestimate" of the true number of infections to date, according to Dr. Anna Banerji, a paediatric infectious disease specialist.

Several countries reported their highest ever daily totals Wednesday, including Brazil, India, Japan, Australia, Uzbekistan, and Morocco.

The world's latest COVID-19 hot spots pushed the confirmed global virus case tally toward 14 million.

A spokesperson for the IOC would not confirm if a decision has been made.