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MediMeisterschaften meets COVID-19 research

Together we can make sure the Medis are safe for everyone. Join the eCOV study today.

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Scientific curiosity is in our nature

Let’s have some fun and help research COVID-19 at the same time. The eCOV study is easy, secure, and completely digital.

Why it’s important

Data4Life, a nonprofit digital health organisation and initiative of the Hasso Plattner foundation, is joining up with MediMeisterschaften 2021 as part of the eCOV study. Together we want to gain data on responsibly hosting large events during the COVID-19 pandemic when only vaccinated or recovered people are in attendance. With your help, we hope to answer some of the following questions: 

  • How effective are COVID-19 vaccines in real life?
  • How does vaccine effectiveness decline over time?
  • Do vaccinated people have different COVID-19 symptoms?
  • What are typical side effects of a COVID-19 vaccine?

Who can participate

The eCOV study is open to anyone over the age of 18. You’re welcome to join regardless of whether or not you received a coronavirus vaccine or recovered from COVID-19.

What to expect

The first step is creating a Data4Life account. Once you’ve registered, we’ll send you the initial questionnaire with 21 general questions about your health. It takes about 5 minutes. Then we’ll check in weekly for a quick update. You’ll receive an email notification each time and a few follow-up questions on COVID-19 symptoms and tests. 

Important: Please report any symptoms and add your COVID-19 test results before and after the MediMeisterschaften in your Data4Life account.

Study details

Short name
eCOV study

Official name
COVID-19 study on vaccinated and unvaccinated adults

PD Dr. med. Cornelius Remschmidt, Chief Medical Officer at Data4Life

Study physician/operational management
Nils Hohmuth

Scientific advisor
PD Dr. Rasmus Leistner

Full study information
View information for participants

Adults (18+ years old)

Browser, internet access

Ethics approval
Ethics committee of the Berlin Chamber of Physicians (Eth-11/22)


The "COVID-19 study for vaccinated and unvaccinated adults," or eCOV study for short, aims to better understand the effectiveness of COVID-19 vaccines.

The study is completely digital and involves answering simple health questions about COVID-19 symptoms, vaccines, side effects, and testing.

By participating, you can help researchers gain insights on COVID-19 testing and vaccines. Participation is voluntary and every answered question helps.

The eCOV study is conducted by the nonprofit digital health organisation Data4Life and supported by the Hasso Plattner Foundation. The lead physician of the study is PD Dr. Cornelius Remschmidt, Chief Medical Officer at Data4Life.

The study is open to anyone over the age of 18.

For meaningful results, we need a good representation of the entire adult population. You’re welcome to participate regardless of whether or not you already had COVID-19, have been vaccinated, or have pre-existing conditions.

Study participation is purely digital. All you have to do is answer a few simple questions. You can do this using your smartphone, tablet, or computer. There are no physical requirements or appointments.

To join the study, register with Data4Life here.

The eCOV questions relate both to your general health and coronavirus. This includes questions about past COVID-19 infections, vaccination, side effects, and COVID-19 testing.

The initial eCOV questionnaire contains a total of 21 questions. It takes no more than 5 minutes to answer. You will then be asked a few follow-up questions each week. This requires around 2 minutes per week.

Ideally, all participants would participate for at least 8 weeks. You are welcome to participate for longer and continue to support vaccine research.

All information in your Data4Life account is private and encrypted.

Before researchers see your answers to the eCOV questions, we remove all personal identifiers (e.g. name, email address, and telephone number). This step, called pseudonymization, makes data useful for research without disclosing your identity.

You can find more information about how we maximize the security of your data here.

As soon as we have collected sufficient data, our scientists will analyze it and publish the results in a medical journal. Recommendations to be derived from the results may help to improve current vaccination and testing strategies.

Yes. The study was extensively reviewed and approved by the ethics committee of the Berlin Chamber of Physicians (Ärztekammer Berlin) in March 2021 (Eth-11/22).

You can withdraw from the study at any time.

In order to help research with important findings on COVID-19 infections, testing, and vaccinations, it is important to receive as many reported tests as possible, as well as potential symptoms. It would be great if you would fill out at least 8 weekly questionnaires. You can answer them any time but ideally when you have taken a test or feel symptoms.

If you would like to drop out earlier, we will do our best to take your previous answers into account.

Important: Data4Life is planning further studies in the future. If you delete your account, all your data on our platform will be permanently deleted.

In the "My Account" section, you will find the "Delete Account" section under "Account Settings" at the bottom.

For more information, please visit our Help Center.

Simply click on "Unsubscribe" in the footer of our newsletter.

Alternatively, you can unsubscribe from our email newsletter in the "My account" section under "Settings" in the "Keep in touch" field.

You can only deactivate the weekly reminder emails for the questionnaires if you withdraw from the study. To do this, you must revoke your consent in the "Participation" field under "My account".

In the eCOV study timeline, click on “Add coronavirus test” at the bottom and indicate when you took the test, what type of test you took, and whether the result was positive or negative. In addition to the testing results, it is also possible to add a vaccination at any time.

The MediMeisterschaften cohort is a side arm of the eCOV study. If you have friends and family who don’t participate in the sports festival, but should be invited to join the eCOV study, feel free to share this link.

Since last fall, the organizers of the MediMeisterschaften have been seeking scientific support for the sports festival. Nils Hohmuth, who works as a physician at Data4Life, had suggested supporting the eCOV study, which he coordinates, for this purpose. The study records tests, symptoms, and contact behavior around COVID-19 and thus provides a good basis for an evaluation about MediMeisterschaften.

During the event, you will be asked to provide vaccination certificates or proof of recovery, as well as test results. These data are not collected centrally and cannot be evaluated scientifically. The study is exactly designed for gathering those data in a pseudonymized way.

Participation is possible for everyone above the age of 18. This is a requirement of the ethics vote of the Berlin Medical Association. We’re sorry that we are unable to provide access to younger participants and kindly ask for their understanding.

If you have further questions or technical problems, please visit our help center.

Data privacy

Your privacy matters to us, and we take a number of steps designed to safeguard your sensitive health data. All information in your Data4Life account is end-to-end encrypted and protected by two-factor authentication. 

Before researchers see any answers to study questions, we remove all personal identifiers such as your name, email address, and telephone number in a process called pseudonymization.

For more information, visit our help center.

Celebrating while supporting COVID-19 research!

MediMeisterschaften is about respect, community, and fun. You can all contribute to making the sports festival a safe place to dance, unwind, and enjoy life to the fullest. To make sure that MediMeisterschaften can take place in the future, join the eCOV study now.

Join now

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