covivac covivac covivac may refer to: vaccine covivac (russia covid-19 vaccine), inactivated covid-19 vaccine developed by the chumakov centre in russia (russian: ковивак) covivac (vietnam covid-19 vaccine), viral vector covid-19 vaccine developed by institute of vaccines and medical biologicals in vietnam, later named ndv-hxp-s covi-vac (u.s. covid-19 vaccine), codenamed cdx-005; live-attenuated covid-19 vaccine developed by codagenix inc.; produced at the serum institute of india