1 “.... It uses data from six national high-frequency phone surveys in countries representing 38 percent...”

2 “... (Burkina Faso, Kenya, Malawi, Nigeria, and Tanzania). The surveys were conducted by countries' national...”

3 “... from (i) national phone surveys that have been implemented in Ethiopia, Malawi, Nigeria, and Uganda...”

4

5 “... of the pandemic surged. Phone surveys started being implemented at a national scale in many places that previously...”