YSF-79681-11342

4 vaccinations 14 coded responses 47 check-ins 13 free-text entries 1 call case

Sex: Female
Age at first dose: 21-25
ZIP prefix: 020 / MA
Registered: 2021-04-30

Relationship: Self
Race: White
Ethnicity: Not Hispanic or Latino

Possible VAERS report

VAERS ID	Confidence	Score	Runner-up	Shared symptoms	Dose	State	VAERS vaccinated / onset / received	Call case
2636798 (opens in a new window)	high	10 / 11	—	2 of 7 VAERS symptoms	same dose (4)	MA matches	2022-11-16 / 2023-02-20 / 2023-05-25 received the same day as the last call	case 718223

From the VAERS matching of call center cases (loader/vaers_match_*). Only the best match is shown, and only if it scores 8 or more out of 11. The score adds up timing (VAERS received soon after the call center contact), dose and shared symptoms; state only breaks ties. Confidence is high when the score is 8+ and at least 3 points ahead of the runner-up, medium when 5+ and 2 ahead, otherwise low. A match is a likely link, not a confirmed one.

Timeline

Registration Vaccinations Survey responses Call reports Cases without a report Call attempts Call successful Pregnancy survey

2021-04-28
Dose 1 — Moderna
2021-04-30
Registered in v-safe
2021-04-30
Survey response — days 1–6 daily, dose 1
MedDRA: Injection site coldness — Feeling: Poor · Site: Pain, Swelling · Headache, Muscle or body aches, Fatigue or tiredness · Be unable to work, Be unable to do your normal daily activities

Free text: the area around the injection site felt cold (under the skin)

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-01
Health check-in — days 1–6 daily, dose 1
Feeling: Fair · Site: Pain, Swelling · Headache, Muscle or body aches, Fatigue or tiredness

Adult check-in
2021-05-02
Health check-in — days 1–6 daily, dose 1
Feeling: Fair · Site: Pain · Headache, Fatigue or tiredness

Adult check-in
2021-05-03
Health check-in — days 1–6 daily, dose 1
Feeling: Fair · Site: Pain · Headache, Fatigue or tiredness

Adult check-in
2021-05-04
Health check-in — days 1–6 daily, dose 1
Feeling: Good · Headache

Adult check-in
2021-05-05
Health check-in — day 7, dose 1
Feeling: Good · Headache

Adult check-in
2021-05-12
Health check-in — day 14, dose 1
Feeling: Good

Adult check-in
2021-05-20
Health check-in — day 21, dose 1
Feeling: Good

Adult check-in
2021-05-26
Dose 2 — Moderna
2021-05-27
Survey response — days 1–6 daily, dose 2
MedDRA: Brain fog, Disturbance in attention — Feeling: Poor · Site: Pain, Swelling · Headache, Muscle or body aches, Fatigue or tiredness · Be unable to work, Be unable to do your normal daily activities

Free text: Feeling foggy/out of it; hard to concentrate

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-29
Survey response — days 1–6 daily, dose 2
MedDRA: Brain fog, Disturbance in attention, Dizziness, Feeling abnormal — Feeling: Fair · Site: Pain, Swelling · Headache, Muscle or body aches, Fatigue or tiredness · Be unable to do your normal daily activities

Free text: Hard to concentrate; feeling foggy/out of it; briefly dizzy

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-30
Survey response — days 1–6 daily, dose 2
MedDRA: Brain fog, Disturbance in attention — Feeling: Fair · Site: Pain, Swelling · Headache, Fatigue or tiredness

Free text: At times (not all day): hard to concentrate, feeling foggy

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-31
Health check-in — days 1–6 daily, dose 2
Feeling: Good · Headache, Fatigue or tiredness

Adult check-in
2021-06-01
Health check-in — days 1–6 daily, dose 2
Feeling: Good · Headache

Adult check-in
2021-06-02
Health check-in — day 7, dose 2
Feeling: Good · None

Adult check-in
2021-06-09
Health check-in — day 14, dose 2
Feeling: Good

Adult check-in
2021-06-18
Health check-in — day 21, dose 2
Feeling: Good

Adult check-in
2021-06-24
Health check-in — day 28, dose 2
Feeling: Good

Adult check-in
2021-06-30
Health check-in — day 35, dose 2
Feeling: Good

Adult check-in
2021-07-09
Health check-in — day 42, dose 2
Feeling: Good

Adult check-in
2021-08-28
Health check-in — 3 months, dose 2
Feeling: Good

Adult check-in
2021-11-29
Health check-in — 6 months, dose 2
Feeling: Good

Adult check-in
2021-12-08
Dose 3 — Moderna
2021-12-09
Health check-in — days 1–6 daily, dose 3
Feeling: Poor · Site: Pain, Swelling · Headache, Muscle or body aches, Fatigue or tiredness · Be unable to work or attend school, Be unable to do your normal daily activities

Adult check-in
2021-12-10
Health check-in — days 1–6 daily, dose 3
Feeling: Fair · Site: Pain, Swelling · Headache, Fatigue or tiredness

Adult check-in
2021-12-11
Health check-in — days 1–6 daily, dose 3
Feeling: Fair · Site: Swelling · Headache, Fatigue or tiredness

Adult check-in
2021-12-14
Health check-in — days 1–6 daily, dose 3
Feeling: Good · None

Adult check-in
2021-12-17
Health check-in — day 7, dose 3
Feeling: Good · None

Adult check-in
2021-12-22
Health check-in — day 14, dose 3
Feeling: Good

Adult check-in
2021-12-29
Health check-in — day 21, dose 3
Feeling: Good

Adult check-in
2022-01-08
Health check-in — day 28, dose 3
Feeling: Good

Adult check-in
2022-01-13
Survey response — day 35, dose 3
MedDRA: Brain fog, Cough, Fatigue, Headache, Nasal congestion, Oropharyngeal pain, Rhinorrhoea, Sneezing, Throat irritation — Feeling: Poor · Be unable to work or attend school, Be unable to do your normal daily activities

Free text: Runny nose; sneezing; nasal congestion/stuffiness; dry cough; itchy/sore throat; headache; tiredness/fatigue/feeling foggy. Symptoms vary in intensity throughout the day.

MedDRA releases: 2024-11 · check-in free text available
2022-01-23
Survey response — day 42, dose 3
MedDRA: Cough, Fatigue, Feeling of body temperature change, Headache, Oropharyngeal pain, Pyrexia, Respiratory tract congestion, SARS-CoV-2 test positive — Feeling: Fair · Be unable to work or attend school, Be unable to do your normal daily activities

Free text: Residual symptoms after testing positive for COVID on Tuesday, Jan. 11th: Tiredness/fatigue; Dry cough/sore throat; Occasional headache and congestion; Occasional fever and feeling warm then chilly

MedDRA releases: 2024-11 · check-in free text available
2022-03-13
Health check-in — 3 months, dose 3
Feeling: Fair

Adult check-in
2022-06-10
Health check-in — 6 months, dose 3
Feeling: Good

Adult check-in
2022-11-16
Dose 4 — Moderna
2022-11-16
Survey response — day 0, dose 4
MedDRA: Brain fog — Feeling: Fair · Site: Pain · Fever · Chills, Headache, Fatigue or tiredness

Free text: Head feeling foggy-mild reaction

MedDRA releases: 2024-11 · check-in free text available
2022-11-17
Survey response — days 1–6 daily, dose 4
MedDRA: Brain fog, Disturbance in attention — Feeling: Poor · Site: Pain, Swelling · Chills, Headache, Muscle or body aches, Fatigue or tiredness · Be unable to work or attend school, Be unable to do your normal daily activities

Free text: Head feeling foggy; difficult to concentrate. Both severe rating.

MedDRA releases: 2024-11 · check-in free text available
2022-11-18
Survey response — days 1–6 daily, dose 4
MedDRA: Brain fog, Disturbance in attention — Feeling: Fair · Site: Pain, Swelling · Chills, Headache, Muscle or body aches, Fatigue or tiredness · Be unable to work or attend school, Be unable to do your normal daily activities

Free text: Head feeling foggy, difficulty concentrating; both moderate to severe

MedDRA releases: 2024-11 · check-in free text available
2022-11-19
Survey response — days 1–6 daily, dose 4
MedDRA: Brain fog, Disturbance in attention — Feeling: Fair · Site: Pain, Swelling · Chills, Headache, Muscle or body aches, Fatigue or tiredness · Be unable to work or attend school, Be unable to do your normal daily activities

Free text: Head feeling foggy, concentration issues; both moderate

MedDRA releases: 2024-11 · check-in free text available
2022-11-20
Survey response — days 1–6 daily, dose 4
MedDRA: Brain fog, Disturbance in attention, Dizziness — Feeling: Fair · Site: Pain, Swelling · Chills, Headache, Muscle or body aches, Fatigue or tiredness · Be unable to work or attend school

Free text: Head feeling foggy/concentration issues at times, occasional dizziness (each day since injection); all moderate

MedDRA releases: 2024-11 · check-in free text available
2022-11-21
Survey response — days 1–6 daily, dose 4
MedDRA: Brain fog, Disturbance in attention — Feeling: Fair · Headache, Fatigue or tiredness

Free text: Head feeling foggy/concentration issues at times (comes and goes); both moderate

MedDRA releases: 2024-11 · check-in free text available
2022-11-23
Survey response — day 7, dose 4
MedDRA: Adverse reaction, Brain fog, Dizziness — Feeling: Good · Headache, Fatigue or tiredness

Free text: Occasional head fogginess/dizziness; mild reactions today

MedDRA releases: 2024-11 · check-in free text available
2022-11-30
Health check-in — day 14, dose 4
Feeling: Good

Adult check-in
2022-12-07
Health check-in — day 21, dose 4
Feeling: Good

Adult check-in
2022-12-14
Health check-in — day 28, dose 4
Feeling: Good

Adult check-in
2022-12-21
Health check-in — day 35, dose 4
Feeling: Good

Adult check-in
2022-12-29
Health check-in — day 42, dose 4
Feeling: Good

Adult check-in
2023-02-19
Health check-in — 3 months, dose 4
Feeling: Good

Adult check-in
2023-05-21
Survey response — 6 months, dose 4
MedDRA: Fibromyalgia, Office visit, Stress — Feeling: Good · Get care from a doctor or other healthcare professional

MedDRA releases: 2024-11
2023-05-21
Report sent to call center — 6 months, dose 4
Get care from a doctor or other healthcare professional

1 call case(s)
2023-05-23
Call 1 — Requested Callback
2023-05-25
Callback requested for
1:00PM ET
2023-05-25
Call successful
Completed over the phone

Vaccinations

Dose	Date	Manufacturer	Co-administered
1	2021-04-28	Moderna
2	2021-05-26	Moderna
3	2021-12-08	Moderna	No
4	2022-11-16	Moderna	No

Call center

Reported	Outcome	VAERS-related outcome
2023-05-21	Successful 2023-05-25	Completed over the phone

Free text

Release 8 — days 1–6 daily, dose 1

2021-04-30

Systemic reaction (other): the area around the injection site felt cold (under the skin)

Release 8 — days 1–6 daily, dose 2

2021-05-27

Systemic reaction (other): Feeling foggy/out of it; hard to concentrate

2021-05-29

Systemic reaction (other): Hard to concentrate; feeling foggy/out of it; briefly dizzy

2021-05-30

Systemic reaction (other): At times (not all day): hard to concentrate, feeling foggy

Release 10 — day 35, dose 3

2022-01-13

Symptoms: Runny nose; sneezing; nasal congestion/stuffiness; dry cough; itchy/sore throat; headache; tiredness/fatigue/feeling foggy. Symptoms vary in intensity throughout the day.

Release 11 — day 42, dose 3

2022-01-23

Symptoms: Residual symptoms after testing positive for COVID on Tuesday, Jan. 11th: Tiredness/fatigue; Dry cough/sore throat; Occasional headache and congestion; Occasional fever and feeling warm then chilly

Release 12 — day 0, dose 4

2022-11-16

Systemic reaction (other): Head feeling foggy-mild reaction

Release 12 — days 1–6 daily, dose 4

2022-11-17

Systemic reaction (other): Head feeling foggy; difficult to concentrate. Both severe rating.

2022-11-18

Systemic reaction (other): Head feeling foggy, difficulty concentrating; both moderate to severe

2022-11-19

Systemic reaction (other): Head feeling foggy, concentration issues; both moderate

2022-11-20

Systemic reaction (other): Head feeling foggy/concentration issues at times, occasional dizziness (each day since injection); all moderate

2022-11-21

Systemic reaction (other): Head feeling foggy/concentration issues at times (comes and goes); both moderate

Release 12 — day 7, dose 4

2022-11-23

Systemic reaction (other): Occasional head fogginess/dizziness; mild reactions today

Each entry is dated by the survey it was written in (the CDC re-sent the releases with survey dates in 2025); click a date to see that survey response. The CDC cut some text off at about 250 characters: symptoms in every release, and the other two fields in releases 9-12. Those entries are marked "cut off by CDC".

MedDRA terms by release

Field	Preferred term	2021-09	2023-04	2024-11
HCVO	Office visit	·	·	✓
SD	Brain fog	·	·	✓
SD	Cough	·	·	✓
SD	Fatigue	·	·	✓
SD	Feeling of body temperature change	·	·	✓
SD	Fibromyalgia	·	·	✓
SD	Headache	·	·	✓
SD	Nasal congestion	·	·	✓
SD	Oropharyngeal pain	·	·	✓
SD	Pyrexia	·	·	✓
SD	Respiratory tract congestion	·	·	✓
SD	Rhinorrhoea	·	·	✓
SD	SARS-CoV-2 test positive	·	·	✓
SD	Sneezing	·	·	✓
SD	Stress	·	·	✓
SD	Throat irritation	·	·	✓
SRO	Adverse reaction	·	·	✓
SRO	Brain fog	✓	✓	✓
SRO	Disturbance in attention	✓	✓	✓
SRO	Dizziness	✓	✓	✓
SRO	Feeling abnormal	✓	✓	✓
SRO	Injection site coldness	✓	✓	✓

✓ active code · ○ coded but marked inactive · blank = not in that release