Apoptosis has a number of advantages over necrosis, the other way that cells die. Apoptosis can eliminate large numbers of cells without inducing inflammation, a major benefit. This process is used during embryogenesis, for example, to eliminate the webbing between the fingers, eliminate the tail, etc. In addition, when cells sense the presence of a replicating virus in the cytoplasm, apoptosis can kill the cell before the virus is able to complete replication. This is an important component of the innate immune response, and many viruses have devised ways to try to block apoptosis.