Fig. 3.

COVID-19 testing rate by week, 2020. Notes: Testing rate = tests done per 100,000 population. The fall in the testing rate from around week 43 can be explained by a variety of factors, including the fall in infection rates after the autumn peak and testing policy (for example, in Poland, lower testing rates may be due to the policy of testing only symptomatic cases). Other reasons could include the introduction of mass antigen testing in Slovakia (see Figure A2 in the Online Appendix), which is not reported in these figures, or lower rates of self-reporting in Czechia to avoid quarantine. Source: ECDC [3].