YC5-33213-53452 · OpenVSafe

Timeline

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

2021-04-07
Dose 1 — Pfizer-BioNTech
2021-04-29
Registered in v-safe
2021-04-29
Dose 2 — Pfizer-BioNTech
2021-04-29
Health check-in — day 0, dose 2
Feeling: Fair · Site: Pain · None

Adult check-in
2021-04-30
Survey response — days 1–6 daily, dose 2
MedDRA: Fatigue, Mastitis — Feeling: Fair · Fatigue or tiredness

Free text: I currently have mastitis so Im not sure if the fatigue is from the mastitis or the vaccine.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-01
Survey response — days 1–6 daily, dose 2
MedDRA: Adverse reaction, Pre-existing disease — Feeling: Fair · Muscle or body aches, Fatigue or tiredness, Nausea

Free text: I have mastitis so the symptoms may also be from that.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-02
Survey response — days 1–6 daily, dose 2
MedDRA: Fatigue, Mastitis, Pre-existing disease — Feeling: Good · Fatigue or tiredness

Free text: I am on day six of antibiotics for mastitis so the fatigue could be from the mastitis.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-03
Health check-in — days 1–6 daily, dose 2
Feeling: Good · None

Adult check-in
2021-05-04
Survey response — days 1–6 daily, dose 2
MedDRA: Mastitis — Feeling: Good

Free text: On day nine of antibiotics for mastitis.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-05
Health check-in — days 1–6 daily, dose 2
Feeling: Poor · Fever · Headache, Muscle or body aches, Fatigue or tiredness, Nausea · Get care from a doctor or other healthcare professional · Telehealth, virtual health, or email health consultation

Adult check-in
2021-05-05
Report sent to call center — days 1–6 daily, dose 2
Get care from a doctor or other healthcare professional

1 call case(s)
2021-05-06
Survey response — day 7, dose 2
MedDRA: Mastitis — Feeling: Poor · Fever · Headache, Muscle or body aches, Fatigue or tiredness, Nausea · Get care from a doctor or other healthcare professional · Outpatient clinic or urgent care clinic visit

Free text: On day 10 of antibiotics and the mastitis moved to my other breast.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-06
Report sent to call center — day 7, dose 2
Get care from a doctor or other healthcare professional

1 call case(s)
2021-05-13
Survey response — day 14, dose 2
MedDRA: Mastitis — Feeling: Fair · Get care from a doctor or other healthcare professional · Outpatient clinic or urgent care clinic visit

Free text: I ended up getting mastitis on the other side even though I was still taking a course of antibiotics.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-13
Report sent to call center — day 14, dose 2
Get care from a doctor or other healthcare professional

1 call case(s)
2021-05-20
Health check-in — day 21, dose 2
Feeling: Good

Adult check-in
2021-05-27
Survey response — day 28, dose 2
MedDRA: Breast feeding — Feeling: Good · Get care from a doctor or other healthcare professional · Outpatient clinic or urgent care clinic visit

Free text: Clogged milk ducts from breastfeeding.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-27
Report sent to call center — day 28, dose 2
Get care from a doctor or other healthcare professional

1 call case(s)
2021-06-05
Health check-in — day 35, dose 2
Feeling: Good

Adult check-in
2021-06-11
Health check-in — day 42, dose 2
Feeling: Good

Adult check-in
2021-07-29
Health check-in — 3 months, dose 2
Feeling: Good

Adult check-in
2021-10-28
Health check-in — 6 months, dose 2
Feeling: Good

Adult check-in
2022-04-14
Call 1 — Left Voicemail

Vaccinations

Dose	Date	Manufacturer	Co-administered
1	2021-04-07	Pfizer-BioNTech
2	2021-04-29	Pfizer-BioNTech

Call center

Reported	Outcome	VAERS-related outcome
2021-05-05	Unsuccessful
2021-05-06	Unsuccessful
2021-05-13	Unsuccessful
2021-05-27	Unsuccessful

Free text

Release 8 — days 1–6 daily, dose 2

2021-04-30

Systemic reaction (other): I currently have mastitis so Im not sure if the fatigue is from the mastitis or the vaccine.

2021-05-01

Systemic reaction (other): I have mastitis so the symptoms may also be from that.

2021-05-02

Systemic reaction (other): I am on day six of antibiotics for mastitis so the fatigue could be from the mastitis.

2021-05-04

Systemic reaction (other): On day nine of antibiotics for mastitis.

Release 8 — day 7, dose 2

2021-05-06

Systemic reaction (other): On day 10 of antibiotics and the mastitis moved to my other breast.

Release 8 — day 14, dose 2

2021-05-13

Symptoms: I ended up getting mastitis on the other side even though I was still taking a course of antibiotics.

Release 8 — day 28, dose 2

2021-05-27

Symptoms: Clogged milk ducts from breastfeeding.

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
SD	Breast feeding	✓	✓	✓
SD	Mastitis	✓	✓	✓
SRO	Adverse reaction	✓	✓	✓
SRO	Fatigue	✓	✓	✓
SRO	Mastitis	✓	✓	✓
SRO	Pre-existing disease	✓	✓	✓

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