NPP-29542-64380 · OpenVSafe

Timeline

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

2022-01-17
Registered in v-safe
2022-01-17
Dose 1 — Pfizer-BioNTech
2022-01-17
Health check-in — day 0, dose 1
Feeling: Good · None

Adult check-in
2022-01-18
Survey response — days 1–6 daily, dose 1
MedDRA: Brain fog — Feeling: Fair · Site: Pain · Muscle or body aches, Fatigue or tiredness

Free text: Brain fog.

MedDRA releases: 2024-11 · check-in free text available
2022-01-20
Survey response — days 1–6 daily, dose 1
MedDRA: Brain fog — Feeling: Fair · Site: Pain · Muscle or body aches, Fatigue or tiredness · Be unable to do your normal daily activities

Free text: Brain fog

MedDRA releases: 2024-11 · check-in free text available
2022-01-23
Health check-in — days 1–6 daily, dose 1
Feeling: Good · Muscle or body aches

Adult check-in
2022-01-26
Health check-in — day 7, dose 1
Feeling: Good · None

Adult check-in
2022-02-07
Dose 2 — Pfizer-BioNTech
2022-02-07
Health check-in — day 0, dose 2
Feeling: Good · Fever · None

Adult check-in
2022-02-08
Health check-in — days 1–6 daily, dose 2
Feeling: Fair · Site: Pain, Swelling · Muscle or body aches, Fatigue or tiredness

Adult check-in
2022-02-09
Health check-in — days 1–6 daily, dose 2
Feeling: Fair · Site: Pain, Swelling · Muscle or body aches, Fatigue or tiredness

Adult check-in
2022-02-11
Survey response — days 1–6 daily, dose 2
MedDRA: Brain fog — Feeling: Fair · Site: Swelling, Itching · Muscle or body aches, Fatigue or tiredness

Free text: Brain fog

MedDRA releases: 2024-11 · check-in free text available
2022-02-13
Health check-in — days 1–6 daily, dose 2
Feeling: Fair · Site: Swelling · Muscle or body aches, Fatigue or tiredness

Adult check-in
2022-02-14
Health check-in — day 7, dose 2
Feeling: Fair · Site: Pain · Joint pains, Muscle or body aches, Fatigue or tiredness · Be unable to do your normal daily activities

Adult check-in
2022-02-21
Health check-in — day 14, dose 2
Feeling: Good

Adult check-in
2022-03-03
Health check-in — day 21, dose 2
Feeling: Fair

Adult check-in

Vaccinations

Dose	Date	Manufacturer	Co-administered
1	2022-01-17	Pfizer-BioNTech	No
2	2022-02-07	Pfizer-BioNTech	No

Free text

Release 10 — days 1–6 daily, dose 1

2022-01-18

Systemic reaction (other): Brain fog.

2022-01-20

Systemic reaction (other): Brain fog

Release 11 — days 1–6 daily, dose 2

2022-02-11

Systemic reaction (other): Brain fog

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
SRO	Brain fog	·	·	✓

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