Answer:
A virus
Explanation:
All prokaryotes and eukaryotes have a cell membrane. The only "living" things that don't are viruses, and they are not even considered strictly living, since they cannot reproduce without a host. They are instead sometimes referred to as an infectious "agent" (which explains why it might affect a few living organisms in the area)
A virus consists of genetic material (either DNA or RNA) surrounded by a protein coat or capsid, which is fitting with this description.
