Bengaluru: Karnataka Health Minister K Sudhakar on Tuesday expressed concern over mortality among the young and mid-age groups due to COVID-19, amid a spike in cases, and has sought for a death audit from expert doctors to know the reasons.He also said the second wave of the pandemic was spreading faster than the first wave."Yesterday there has been an increase in cases.For the first time in the last six months 5,279 fresh cases were reported.