A total of 2,054 samples were collected on the first day of the exercise on Saturday, across the 17 sub-counties in Nairobi.
The NMS team, led by Director-General Mohamed Badi, has ramped up testing amid concerns about a second wave of infections in several counties in Kenya.
More than 2,000 Nairobi residents have been tested for Covid-19 in the second phase of free voluntary mass testing launched by the Nairobi Metropolitan Services (NMS) over the weekend.
A total of 2,054 samples were collected on the first day of the exercise on Saturday, across the 17 sub-counties in Nairobi.