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Report #2878601

Received Dec 18, 2025

Office visit
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
34 yrs
State
CT
Recovered
Not recovered
Vaccinated
Dec 15, 2025
Onset
Dec 17, 2025
Days to onset
2
Hospital days
—

Vaccines (1)

TypeNameManufacturerDoseLotRoute / Site
PNC21PNEUMO (CAPVAXIVE)MERCK & CO. INC.N/AZ010457IM / RA

Symptoms (7)

HeadacheInjection site cellulitisInjection site erythemaInjection site painInjection site swellingInjection site warmthPyrexia

Symptom narrative

I developed painful swelling that is red and hot to the touch as well as painful if touched around the injection site on my right arm. After the vaccine (Monday 12/15), I developed a mild fever that afternoon and then had a headache on & off for two days. On Wednesday (12/17) morning, I felt my arm still hurt when I woke up and then later in the morning saw it was red & swollen when I went to take off the band-aid. My partner drew a dotted sharpie line around the site of the swelling and it is about the size of a small cup coaster. My partner took a photo which I sent to my doctors office via online office chart and they followed up the next morning (Thursday 12/18) asking me to come in that afternoon to have it evaluated by PA-C. From the office visit notes, PA-C determined it was "Cellulitis of right upper extremity" noting that "There is circular erythematous area noted over the right deltoid muscle (approx 1.5x1.5 inches in size); there is tenderness and mild swelling" and that "Patient states she received the pneumococcal conjugate 21 vaccine 4 days ago and since then she has noticed redness, swelling, and tenderness in the right arm. Patient drew a circle around the affected area to monitor for worsening symptoms. In the last day, redness has spread mildly". She prescribed cephalexin (KEFLEX) 500 MG capsule; Take 1 capsule (500 mg total) by mouth 2 (two) times a day for one week. I will start this prescription tonight; I was told to check back in with the office if arm swelling/redness doesn't clear up within one week. Office declined to submit a VAERS report when requested and suggested I submit it myself.

Medical history

Asthma, celiac, hypothyroidism (Hashimoto's thyroiditis)

Other medications

Prescriptions: Tirosint 88 MCG Caps (once a day), Albuterol 108 (90 Base) MCG/ACT inhaler (as needed); Supplements: Vitamin D3 & K2 (Brand - Vital Nutrients), B12 & Methyl Folate (Brand - Vital Nutrients)

Allergies

Celiac; seasonal & pet allergies