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. 2022 Apr 9;137(4):649–654. doi: 10.1177/00333549221083741

Figure 2.

Figure 2.

Number of community-based antibody tests, by quarter (Q), San Francisco, 2019-2020. The dashed vertical line indicates COVID-19 shelter-in-place order.16 Antibody-reactive tests indicate past or present HCV infection.