Oral Side Effects of COVID-19 Vaccine
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ClinicalTrials.gov Identifier: NCT04706156 |
Recruitment Status : Unknown
Verified January 2021 by Masaryk University.
Recruitment status was: Recruiting
First Posted : January 12, 2021
Last Update Posted : February 25, 2021
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Condition or disease | Intervention/treatment |
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Oral Manifestations Covid19 Vaccine Adverse Reaction | Biological: COVID-19 Vaccine |
The primary objective of this multicentre cross-sectional survey-based study is to estimate the prevalence of oral side effects of COVID-19 vaccine in the short term.
The secondary objectives are:
- to identify the risk factors of COVID-19 vaccine oral side effects in the short term.
- to evaluate the relationship between oral side effects and other inflammatory side effects of COVID-19 vaccine in the short term.
The target population is healthcare workers as they are identified among the priority groups of COVID-19 vaccine deployment plans in the EU/EEA and the UK. One more reason to select the healthcare workers among different groups of the population, their higher awareness about the possible vaccine-related oral side-effects so that more accurate and reliable results can be obtained.
A self-administered questionnaire will be developed, and its content validity will be tested using a panel of experts. The test re-test reliability of the questionnaire will be tested by 30 volunteers (10 Czech, 10 Turkish, 10 German) to achieve at least a Cronbach's alpha of 0.70. The questionnaire will be available in five languages; Czech, English, German, Slovak and Turkish. Dual forward translation and expert panels will produce equivalent Czech, German, Slovak and Turkish versions of the questionnaire.
The questionnaire will be composed of multiple-choice items divided into four main categories; a) demographic data including gender, age, location of practice, profession, and experience, b) medical anamnesis including medical comorbidities, medications, and recent oral symptoms, c) COVID-19 related anamnesis including vaccination date, previous infection, and exposure to infected cases, and d) vaccine side effects including inflammatory symptoms, cutaneous symptoms, and oral symptoms. (Annex 1)
Study Type : | Observational |
Estimated Enrollment : | 1540 participants |
Observational Model: | Ecologic or Community |
Time Perspective: | Cross-Sectional |
Official Title: | Oral Side Effects of COVID-19 Vaccine: A Multicenter Cross-sectional Study |
Actual Study Start Date : | January 27, 2021 |
Estimated Primary Completion Date : | February 28, 2021 |
Estimated Study Completion Date : | March 31, 2021 |

Group/Cohort | Intervention/treatment |
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Vaccinated Healthcare Workers (CZ)
Czech healthcare workers who received COVID-19 vaccine during the last 30 days (n=385)
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Biological: COVID-19 Vaccine
Receiving coronavirus disease (COVID-19) vaccine e.g. Pfizer-BioNTech, Moderna, Oxford/AstraZeneca, or Sinovac COVID-19 Vaccine |
Vaccinated Healthcare Workers (DE)
German healthcare workers who received COVID-19 vaccine during the last 30 days (n=385)
|
Biological: COVID-19 Vaccine
Receiving coronavirus disease (COVID-19) vaccine e.g. Pfizer-BioNTech, Moderna, Oxford/AstraZeneca, or Sinovac COVID-19 Vaccine |
Vaccinated Healthcare Workers (SK)
Slovak healthcare workers who received COVID-19 vaccine during the last 30 days (n=385)
|
Biological: COVID-19 Vaccine
Receiving coronavirus disease (COVID-19) vaccine e.g. Pfizer-BioNTech, Moderna, Oxford/AstraZeneca, or Sinovac COVID-19 Vaccine |
Vaccinated Healthcare Workers (TR)
Turkish healthcare workers who received COVID-19 vaccine during the last 30 days (n=385)
|
Biological: COVID-19 Vaccine
Receiving coronavirus disease (COVID-19) vaccine e.g. Pfizer-BioNTech, Moderna, Oxford/AstraZeneca, or Sinovac COVID-19 Vaccine |
- Oral Side Effects [ Time Frame: 0-30 days after the COVID-19 vaccine shot ]Dichotomous outcome for the emergence of oral side effects (e.g. ulcers, vesicles, blisters, plaque, mouth odour, bleeding gum, burning gingiva, etc) following receiving the COVID-19 vaccine.
- Dermatologic Side Effects [ Time Frame: 0-30 days after the COVID-19 vaccine shot ]Dichotomous outcome for the emergence of dermatologic side effects (e.g. injection site swelling, or redness, rash, urticaria, angioedema, etc) following receiving the COVID-19 vaccine.
- General (common) Side Effects [ Time Frame: 0-30 days after the COVID-19 vaccine shot ]Dichotomous outcome for the emergence of typical side effects (e.g. injection site pain, injection site swelling, injection site redness, tiredness, headache, nausea, muscle pain, joint pain, fever, swollen lymph nodes (lymphadenopathy), etc) following receiving the COVID-19 vaccine.

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Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | Yes |
Sampling Method: | Non-Probability Sample |
Inclusion Criteria:
- Healthcare workers who received COVID-19 vaccine during the last 30 days.
- Participating subjects should be at least 18-year-old and able to give their informed consent independently.
Exclusion Criteria:
- The healthcare workers who did not receive the COVID-19 vaccine recently.
- Non-healthcare workers who received the COVID-19 vaccine recently.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04706156
Contact: Abanoub Riad, DDS | +420721046024 | abanoub.riad@med.muni.cz |
Czechia | |
Department of Public Health, Faculty of Medicine, Masaryk University | Recruiting |
Brno, South-Moravia, Czechia, 625 00 | |
Contact: Abanoub Riad, DDS +420 549 49 6572 abanoub.riad@med.muni.cz | |
Contact: Michal Koscik, PhD +420 549 49 1324 koscik@med.muni.cz | |
Germany | |
Department of Cranio-Maxillofacial Surgery, Justus-Liebig University Giessen | Recruiting |
Giessen, Hesse, Germany, 353 92 | |
Contact: Sameh Attia, DDS Sameh.Attia@dentist.med.uni-giessen.de | |
Clinic for Conservative Dentistry and Periodontology, School of Dental Medicine, Christian-Albrecht's University | Recruiting |
Kiel, Schleswig-Holstein, Germany, 241 05 | |
Contact: Jonas Conrad, DDS conrad@konspar.uni-kiel.de | |
Contact: Mohamed Mekhemar, DDS mekhemar@konspar.uni-kiel.de | |
Slovakia | |
Department of Maxillofacial Surgery, F. D. Roosevelt University Hospital | Recruiting |
Banská Bystrica, Banska Bystrica, Slovakia, 975 17 | |
Contact: Barbora Hocková, DDS bhockova@nspbb.sk |
Principal Investigator: | Abanoub Riad, DDS | Masaryk University |
Publications:
Responsible Party: | Masaryk University |
ClinicalTrials.gov Identifier: | NCT04706156 |
Other Study ID Numbers: |
OSECV |
First Posted: | January 12, 2021 Key Record Dates |
Last Update Posted: | February 25, 2021 |
Last Verified: | January 2021 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Plan Description: | In accordance with the General Data Protection Regulation (GDPR), the data controller is Masaryk University (MUNI) and will be used solely by MUNI for the purpose of research in area of public health. The collected data will not be accessed or used by other institutions or for any other purposes. The data will be processed and analysed during the duration of the project (approximately one year). After the project is finished, the data will be encrypted and safely stored by MU as a measure to secure the integrity of the research. |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Product Manufactured in and Exported from the U.S.: | Yes |
COVID19 Oral Manifestations Vaccine Adverse Reaction |
COVID-19 Oral Manifestations Respiratory Tract Infections Infections Pneumonia, Viral Pneumonia Virus Diseases Coronavirus Infections |
Coronaviridae Infections Nidovirales Infections RNA Virus Infections Lung Diseases Respiratory Tract Diseases Mouth Diseases Stomatognathic Diseases |