A droplet falls from a syringe after a health care worker was injected with the Pfizer-BioNTech COVID-19 vaccine at a hospital in Providence, R.I., Tuesday, Dec. 15, 2020. In 2023, many conspiracy theorists claimed a long-planned test of the emergency broadcast system would activate chemicals contained within COVID-19 vaccines. Those who got the shot would be killed, or perhaps turned into zombies. (AP Photo/David Goldman, File)
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