X0306 4 2022-03-11 0001092662 CHEMBIO DIAGNOSTICS, INC. CEMI 0001848740 Bespalko David William C/O CHEMBIO DIAGNOSTICS, INC. 555 WIRELESS BOULEVARD HAUPPAUGE NY 11788 true Restricted stock units 2022-03-11 4 A 0 32000 0 A Common stock 32000 32000 D Nonqualified stock options 1.25 2022-03-11 4 A 0 41143 0 A 2032-03-10 Common stock 41143 41143 D Each restricted stock unit represents a contingent right to receive one share of Common Stock. The restricted stock units are scheduled to vest in full immediately prior to the earlier of (i) the 2023 annual meeting of stockholders of the issuer and (ii) a Change in Control (as defined in the 2019 Omnibus Incentive Plan of the issuer). The nonqualified stock options are scheduled to vest and become exercisable in full immediately prior to the earlier to occur of (i) the 2023 annual meeting of stockholders of the issuer and (ii) a Change in Control. /s/ Mark L. Johnson, Attorney-in-Fact for David William Bespalko 2022-03-15