TABLE 2—

Incidents of Public Health Significance Associated With National Poison Data System Case-Based Surveillance Anomalies: United States, 2013–2018

	Arsenic	Botulism	Ciguatera	Ricin	Paralytic Shellfish Poisoning	Pufferfish	Radiation	Nerve Agents	Weapons of Mass Destruction	Total
Total anomalies, no.	1873	332	1096	814	697	153	1029	141	277	6412
Anomalies representing IPHSs, no.	33	131	135	14	55	7	30	2	0	407
Distinct IPHS identified, no.	13	90	57	7	30	2	20	2	0	221
Positive predictive value, %	1.8	39.5	12.3	1.7	7.9	4.6	2.9	1.4	0.0	6.3

Note. IPHS = incident of public health significance.