Many patients develop autoimmune diseases after covid-19 vaccination, whether related to the vaccination or not, is still under study. This study will describe potential flare of ARD after COVID-19 vaccination, whether it leads to activity or new MSK manifestations development.

-In this study: patients with known diagnosed rheumatic diseases who are vaccinated (one or full doses) of any type of COVID-19 vaccines will be enrolled. new ARD and prevalence of different MSK manifestations after covid-19 vaccinations also will be reported. The prevalence of flare of ARD after covid-19 vaccinations will be dteremined. Also we will compare between different types and doses of covid-19 vaccinations in inducing ARD or flares.

Study Design: Cross sectional study Target population: any patient with pre-existing received any vaccination against covid-19 visiting rheumatology outpatient clinic.

-any patient develops MSK manifestations after covid-19 vaccination. The disease activity sataus will be measured according to the type of rheumatic disease. For RA , disease activity score28 will be used, in lupus: SLEDAI, in Behcet : BDCAF, in SpA: BASDAI.

Inclusion Criteria:

Age above 18 years Vaccinated against covid-19 (one dose or fully vaccinated)

Exclusion Criteria:

Receiving other vaccine e.g influenza Less than 18 years old

Eligibility Criteria:

Patients above 18 years old having MRD manifestations vaccinated against covid-19.