A case series study on the clinical courses of patients with myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) after COVID-19 vaccination

A case series study on the clinical courses of patients with myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) after COVID-19 vaccination - A case series study on the clinical courses of patients with myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) after COVID-19 vaccination

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000055013

Enrollment

Registered

2024-07-18

Start date

2024-06-10

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Myalgic Encephalopathy / Chronic Fatigue Syndrome

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: (1) Patients who attended or were admitted to the study institution between December 2020 and February 29, 2024. (2) Patients who meet the diagnostic criteria for ME/CFS (as defined in the 2003 Canadian Clinical Case[9])

Exclusion criteria

Exclusion criteria: (1)Patients with no prior COVID-19 vaccination.

Design outcomes

Primary

Measure	Time frame
Checking the diagnostic criteria for ME/CFS, the clinical course of individual cases will be investigated in detail using medical records to examine patient background, medical history, COVID-19 vaccination history, laboratory value trends, and treatment history, and to determine the efficacy of vitamin D replacement therapy.	—

Countries

Japan

Contacts

Public ContactShinichiro Kodama

Japanese Society for Vaccine-related Complications Not applicable

info@jsvrc.jp0797-86-1313

Outcome results