Table 1.

Possible dimensions to categorise engineered gene drive strategies

Intended outcome	Potential for engineered gene drive to spread and persist
	Self‐limiting		Self‐sustaining
	High threshold	Low threshold	High threshold	Low threshold
Population suppression or modification	Spatially restricted (localised) and temporally restricted (transient) drives	Spatially unrestricted (non‐localised) and temporally restricted (transient) drives	Spatially restricted (localised) and temporally unrestricted (persistent) drives	Spatially and temporally unrestricted (non‐localised and persistent) drives