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Report #2897592

Received May 22, 2026

A note on interpretation. VAERS reports are unverified and may be incomplete or coincidental. A report does not establish that a vaccine caused an event, and counts should not be used to calculate incidence or infer causation. Full disclaimer

Overview

Sex
Female
Age
1 yrs
State
MA
Recovered
Unknown
Vaccinated
May 7, 2026
Onset
May 18, 2026
Days to onset
11
Hospital days
—

Vaccines (1)

TypeNameManufacturerDoseLotRoute / Site
MMRMEASLES + MUMPS + RUBELLA (MMR II)MERCK & CO. INC.1Z006272IM / LL

Symptoms (18)

Basophil percentageEosinophil count decreasedEosinophil percentageErythroblast morphologyHaematocrit normalHaemoglobin normalLymphocyte count increasedLymphocyte percentage increasedMean cell haemoglobin normalMean cell volume decreasedMean platelet volume normalMonocyte count decreasedMonocyte percentagePlatelet count decreasedRed cell distribution width normalThrombocytopeniaWhite blood cell countWhite blood cell count normal

Symptom narrative

Due to prior history of iron deficiency anemia patient had a follow up CBC drawn. labs demonstrated the following (copied and pasted below - summary is that platelets were low as well as low ANC. patient was otherwise asymptomatic and this was an incidental finding) plan is to repeat draw a cbc in 2-4 weeks. Per CDC website MMR can cause thrombocytopenia, : 05/18/26 10:52 Leukocytes: 6.1 Erythrocytes: 4.21 Hemoglobin: 11.5 Hematocrit: 33.6 Mean Corpuscular Volume: 79.8 Mean Corpuscular Hemoglobin: 27.3 Mean Corpuscular Hemoglobin Conc: 34.2 Platelets: 148 (L) Mean Platelet Volume: 10.0 Erythrocyte Distribution Width SD: 36.9 (L) Erythrocyte Distribution Width CV: 12.9 Polymorphonuclear Percent: 11 (L) Lymphocytes Percent: 75 (H) Monocytes Percent: 6 Eosinophils Percent: 1 Basophils Percent: 1 Reactive Lymphocytes Percent: 6 (H) Neutrophils Absolute: 0.67 (L) Lymphocytes Absolute: 4.58 Monocytes Absolute: 0.37 Eosinophils Absolute: 0.06 Basophils Absolute: 0.06 Reactive Lymphocytes Absolute: 0.37 (H) Erythrocyte Morphology: Normal (L): Data is abnormally low (H): Data is abnormally high

Current illness

very minor iron deficiency. not anemic.

Medical history

prior positive testing to lead of 5.5 ug/dl on 2/27/26

Other medications

Ferrous Sulfate 15 mg elemental iron/mL taking 1.9 mL by mouth daily

Allergies

None

Lab data

05/18/26 10:52 Leukocytes: 6.1 Erythrocytes: 4.21 Hemoglobin: 11.5 Hematocrit: 33.6 Mean Corpuscular Volume: 79.8 Mean Corpuscular Hemoglobin: 27.3 Mean Corpuscular Hemoglobin Conc: 34.2 Platelets: 148 (L) Mean Platelet Volume: 10.0 Erythrocyte Distribution Width SD: 36.9 (L) Erythrocyte Distribution Width CV: 12.9 Polymorphonuclear Percent: 11 (L) Lymphocytes Percent: 75 (H) Monocytes Percent: 6 Eosinophils Percent: 1 Basophils Percent: 1 Reactive Lymphocytes Percent: 6 (H) Neutrophils Absolute: 0.67 (L) Lymphocytes Absolute: 4.58 Monocytes Absolute: 0.37 Eosinophils Absolute: 0.06 Basophils Absolute: 0.06 Reactive Lymphocytes Absolute: 0.37 (H) Erythrocyte Morphology: Normal (L): Data is abnormally low (H): Data is abnormally high