Paul Ng'ang'a Wanjiru was found guilty of murdering the woman after a spat over child support.
Health ministry also announces five more deaths, raising the toll to 465 and 198 more recoveries, raising the total to 15,298.
This follows EACC investigations into claims of irregularities in Covid-19 procurements.
Six candidates battled it out for the chance to replace Ms Beatrice Elachi who resigned on Tuesday.
KMPDU says doctors working for Nairobi County have not been provided with comprehensive medical insurance cover since July.