Coronavirus - Zambia: COVID-19 update (15 May 2021) LUSAKA, Zambia, May 18, 2021/APO Group/ -- As of 15th May, we report 53 new cases out of 6,171 tests (1% positivity), 78 recoveries, and 7,417 new vaccinations; no new deaths were recorded. Distributed by APO Group on behalf of Zambia National Public Health Institute (ZNPHI).