The claim is not supported by any credible evidence. Official U.S. and international health agencies do not report a zombie outbreak, and the CDC’s zombie materials were created as fictional preparedness tools, not outbreak announcements. References to zombie plans or “zombie viruses” are hypothetical, metaphorical, or about unrelated scientific topics, not evidence of undead people in the United States.
Caveats
CDC zombie content is a preparedness campaign using fiction, not confirmation of a real emergency.
Military or agency contingency plans can cover absurd hypothetical scenarios; their existence does not prove the threat exists.
Some sources use “zombie” metaphorically, such as for revived ancient microbes or popular culture, which should not be conflated with an actual outbreak.