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Data source: VAERS (Vaccine Adverse Event Reporting System)

Data through 2026 · Updated quarterly

Built by TheDataProject.ai · © 2026 VaccineWatch

Important: VAERS accepts reports of adverse events following vaccination. For any given report, there is no certainty that the reported event was caused by the vaccine. Reports may contain information that is incomplete, inaccurate, coincidental, or unverifiable. Most reports to VAERS are voluntary, which means they are subject to biases. This data cannot be used to determine if vaccines cause or contribute to adverse events.

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Important: VAERS reports alone cannot determine if a vaccine caused an adverse event. Reports may contain incomplete, inaccurate, or unverified information. Correlation does not equal causation.

  1. Home
  2. Vaccines
  3. FLU(H1N1)
  4. Drug exposure during pregnancy
FLU(H1N1)×Drug exposure during pregnancy

Drug exposure during pregnancy Reports for FLU(H1N1)

#23 most reported symptom for this vaccine

354
Reports
2
Deaths
72
Hospitalizations
0.56
Mortality Rate
%
20.3
Hosp. Rate
%

Drug exposure during pregnancy and FLU(H1N1)

Drug exposure during pregnancy has been reported 354 times in association with FLU(H1N1) vaccination in VAERS.

Among these reports, 2 mentioned death (0.56%) and 72 involved hospitalization (20.3%).

Drug exposure during pregnancy is the #23 most frequently reported symptom for FLU(H1N1) out of 993 total symptoms.

Disclaimer: VAERS reports describe events that occurred after vaccination but do not establish that the vaccine caused the event. Many reported symptoms may be coincidental or related to underlying conditions.

What This Means

Seeing 354 reports of Drug exposure during pregnancy after FLU(H1N1) vaccination may seem alarming, but context is critical.

The mortality rate among these reports is very low at 0.56%, suggesting most cases are non-fatal.

Important Context

•Association, not causation: These reports show Drug exposure during pregnancy occurred after vaccination, not that the vaccine caused it.
•Background rates: Drug exposure during pregnancy may occur naturally at baseline rates in the population, unrelated to vaccination.
•Anyone can report: VAERS accepts reports from anyone — patients, parents, healthcare providers — without requiring medical verification.
•Denominator missing: VAERS counts reports, not rates per dose. Without knowing how many doses were given, raw counts can be misleading. Learn more →

Similarly Ranked Symptoms

Cough400 reportsNo adverse event360 reportsMyalgia310 reportsDiarrhoea302 reports

Quick Facts

Reports:354
Deaths:2
Hospitalizations:72
% of Vaccine:—%
Rank:#23 of 993

Related Pages

FLU(H1N1) OverviewDrug exposure during pregnancy (All Vaccines)Why Raw Numbers MisleadTop Symptoms Analysis

Data Source

This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.