The World Health Organisation is keeping an eye on a new strain of the Covid-19 Omicron variant, NZ Herald reports, which appears to be 10% more transmissible than BA.2 Omicron, the current strain circulating in New Zealand. Meanwhile, University of Auckland computational biologist Dr David Welch is worried that the next big Covid-19 variant could begin spreading in New Zealand weeks before being detected because of “patchy” genomic surveillance amid the Omicron wave.