VACAVILLE — The Covid-19 test strips were about the size of a small hand. On one end was the cotton swab that was inserted into the nasal cavity. The entire thing looks something like a large pregnancy test.

Mena Bubakar, Covid test collector for BayPLS, a mobile testing company for the Bay Area, places a solution over the end of the cotton swab to create a reaction to test for Covid. One line means negative and two lines means positive.

The test strips are marked by time and placed on a table. She inputs them after more than a few minutes of waiting. A lot of the tests Saturday have two lines, meaning people who came into the Vacaville School District Covid testing center have Covid-19.