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In the winter semester, a valid "2,5G-proof" is required for participation in classroom teaching and presence examinations. The 2,5Gs indicate proof of a low epidemiological risk ("vaccinated", "tested", "recovered"). Appropriate proof must be kept available when staying in WU buildings and must be presented upon request. In order to minimise the risk of spreading COVID-19 on Campus WU, we urgently ask you to check the students' 2,5G-proofs at the beginning of your courses and exams. The current plan for checking the 2,5G certificate includes a mix of decentralised controls by the teachers and centrally organised controls of the buildings by the campus management.

Central 2,5G controls

Central controls will "replace" the decentralised checks for the respective days and buildings. In the first weeks of the semester, these central controls will cover most periods, especially in front of the TC.

  • You can see the current central controls in these table for octobre and november. The concrete times of the controls are based on the utilisation of the buildings, into account the budgetary possibilities.
  • We strongly advise students to arrive at Campus WU 30-45 minutes before the start of courses/exams. Since longer waiting times may occur during peak times, we kindly ask for your understanding if students are a little late.
  • At the same time, please also allow for an appropriate time buffer, as the central controls in front of the buildings also apply to teachers.

2,5G-Checks by teachers

Carrying out 2,5G-proof checks

A "Fast Lane Sticker" on the student ID card is going to make it easier to check whether a students has a valid vaccination or convalescence certificate whilst also checking the student's identity:

  • Students with a valid vaccination or convalescence certificate - valid until to and including February 27th 2022 - can obtain a Fast Lane Sticker for their student ID card.
  • The stickers will be handed out from October 25th on the ground floor of the TC (learning zone directly to the left of the entrance), Monday to Friday between 9 am and 3 pm.
  • An identity check is carried out directly upon issuing the sticker. No data is stored during this process. Similarly, the distribution of the sticker is not recorded anywhere.
  • The sticker is a watermarked security label that cannot easily be removed without damaging it.
  • Therefore, during the 2.5 checks, only the photo on the ID card has to be checked by students with Fast Lane Sticker.


2,5G-checks involve the presentation of a valid 2,5G-certificate and a photo ID. The verification can be presented digitally on a smartphone or analogue as a printout. In any case, students are advised to carry an analogue proof as well.

The check can be done in two ways:

(1) How to read the information on the 2,5G-proof

The following information on the proof needs to be checked for verification:

  • Surname(s) and first name(s) of the person
  • Type of 2,5G-certificate (e.g. vaccination, test, antibody detection)
  • Validity
    • can be calculated based on the date of the certificate (vaccination date, tim of testing, etc.) OR
    • some proofs contain an "expiry date", e.g. certificate of recovery, laboratory result of "Alles Gurgelt!"

(2) Scanning a corresponding QR code ("Green Passport") using GreenCheck

The Austrian GreenCheck application (currently only available in German) is accessible to everyone free of charge. It can be used as a web application without installation on the smartphone or PC via or you can download the GreenCheck app (ITSV GmbH/Austrian Social Insurance) from the iOS App Store or Google Play Store.

No personal data is transmitted either through the web application or the app - the check is carried out offline, i.e. only on the device of the person carrying out the check.

Please note that "Vienna" must be selected in the GreenCheck application. The WU follows the Viennese regulation, which apply from September 1, 2021. The federal regulation isn't longer accepted.

Checking via App contains the following steps:

  1. Open your GreenCheck app.
  2. Allow the app to access your camera.
  3. Select "Entry test".
  4. Select "Vienna".
  5. Scan the QR code.
  6. Now, you can see, whether the proof is valid (green tick) or invalid (red circle with cross). If not valid, please check the "human readable" information on the proof as well.

Checking via web application contains the following steps:

  1. Open your internet browser.
  2. Go to
  3. Allow the app to access your camera.
  4. Select "Entry test".
  5. Select "Vienna".
  6. Scan the QR code.
  7. Now, you can see whether the proof is valid (green tick) or invalid (red circle with cross). If not valid, please check the "human readable" information on the proof as well.

Results of the GreenCheck (illustrations in the app, these are similar in the web application):

If your smartphone does not recognise the QR code immediately, ask the students to brighten the phone's display and to enlarge the QR code if necessary.

Altering the distance between the mobile phones can also help. If it still does not work, ask the students to show the readable document.

The 2,5G check should take place at the beginning of the course:

  • For large auditoriums (>120), please carry out the check in front of the room. For the Audimax, a one-way system is in place, the upper door (directly by the main entrance of the TC) is used as entrance, the lower door (by the lecturer's desk) as exit.
  • For smaller classrooms (<60), the check should take place in the room to prevent blocked escape routes.

You can ask students to wear a mask for the duration of the 2,5G checks.

Teachers are responsible for carrying out 2,5G checks in courses/examinations. It is possible for you to organise support from colleagues, e.g. at the institute, but please note that the checks can only be carried out by WU staff. The teacher must ensure that the checks are carried out properly.

As the checks involve sensitive health data, students are not allowed to carry out the checks during the course/examinations under any circumstances.

In WS 2021/22, there will be centrally organised, random checks in all buildings on Campus WU in addition to the 2,5G checks by teachers. For cost reasons, a centrally organised, area-wide check of all buildings is not possible at WU. Thus, WU is not able to provide additional staff for the checks before individual courses.


As all the certificate contain health data, they may be stored, i.e. no written notes, e.g. iin the participants' lists, stating that someone has been vaccinated. Polls ("Who is vaccinated?") in the classroom or via Doodle are likewise prohibited.

In addition, no verfication may be received via email or uploaded and stored in other places (Dropbox, Microsoft Teams, MyLEARN etc.).


As all the certificates contain health data, they may not be stored. No verification may be received via email or uploaded and stored in other places (Dropbox, Microsoft Teams, MyLEARN etc.). In addition, no written notes, e.g. in the participants' lists, stating that someone has been vaccinated. Polls ("Who is vaccinated?") in the classroom or via Doodle are likewise prohibited.

Students will be informed to arrive at least 20 minutes before the start of their course (at particularly busy times during the semester, the recommendation will be 30 to 45 minutes, as the centrally organised random checks in front of the buildings might take longer).

However, if someone is late, the student's 2,5G-certificate must be checked as soon as possible.

Due to the high utilisation of the rooms and the planning security for the students, course units cannot deviate from the regularly planned times regardless of the 2,5G checks. Moreover, the tight booking situation does not allow for the systematic scheduling of "changing times". This is why all teachers are asked to finish punctually, ideally 5-10 minutes early, so that the next course can start on time.

The 2,5G-certificate must be valid at the time of the check. Should it expire during the course, there will be no consequences for participation in the course/examination.

Students who cannot show (valid) 2,5G-proof at the check must be asked to leave the building immediately. Point out the testing facilities nearby to the students (see information on testing facilities).

If participation in the course is not possible due to the lack of or expired proof, it means that the student is absent without excuse from the course or examination with regard to any compulsory attendance. The lack of proof does not count as an important reason for absence, as this lies within the direct control of the student.

If students refuse to leave the classroom even after repeated requests, please call DW 6600 (+43 1 31336 6600). Security Management will assist you in this situation.

Yes, according to the WU regulations effective from July 5th, all staff and external visitors need to have a valid 2,5G-certificate to enter WU buildings.

Valid 2,5G-proofs

Evidence of a low epidemiological risk is considered to be:

1. Tests (in German or English)

  • Molecular tests, such as PCR tests (like Alles Gurgelt!) for SARS-CoV-2

2. Vaccination (with a centrally licensed vaccine against COVID-19)

  • Second vaccination, provided it was not received more than 270 days ago, or
  • Vaccination at 22 days after vaccination where only one vaccination is scheduled, provided it was not received more than 270 days ago, or
  • Vaccination, provided that a positive molecular test for SARS-CoV-2 or evidence of neutralising antibodies has been obtained at least 21 days prior to vaccination and that the vaccination has not taken place more than 270 days ago.

3. Proof of recovery from an infection with SARS-CoV-2 within the last 180 days or medical confirmation of an infection with SARS-CoV-2 within the last 180 days, confirmed by a molecular test.

4. Proof of neutralising antibodies, not older than 90 days.

5. A certificate of segregation "Absonderungsbescheid", issued to a person confirmed to be infected with SARS-CoV-2 until 180 days after initial testing.

Proof Validity as of Octobre 1, 2021
"Viennese regulation"
Antigen test for self-testing (recorded in an official data processing system) invalid
Antigen test performed by an authorised body invalid
PCR test (f.i. Alles Gurgelt!) 48 hours
2nd Vaccination (BioNTech Pfizer, Moderna, AstraZeneca) (vaccination certificate: 2/2) from vaccination date: 270 days = 9 months
1st vaccination (Johnson&Johnson) (vaccination certificate: 1/1) from 22nd day after vaccination: 270 days = 9 months
1st vaccination for convalescents (vaccination certificate: 1/1) from vaccination date: 270 days = 9 months
Recovery certificate, medical confirmation of recovery 180 days = 6 months
Proof of neutralising antibodies 90 days = 3 months
Certificate of isolation "Absonderungsbescheid" 180 days = 6 months

Test results & attestations (in German or English) should include at least the following data:

  1. first and last name of the person concerned
  2. date of birth
  3. type of 2,5G-proof, if applicable type of test
  4. date/period of validity
  5. name of the issuing body (e.g. institution, doctor)

At WU, only vaccines approved in Austria/EU are currently recognised:

  • BioNTech and Pfizer
  • Moderna
  • AstraZeneca
  • Janssen Pharmaceutica NV (Johnson & Johnson)

Sputnik V & Sinopharm are not considered valid proof, i.e. these students still have to bring a corresponding test certificate.

Please note that the name of the vaccine on the sticker in the vaccination certificate is "Comirnaty" for BioNTech and Pfizer and "Vaccine Janssen" for Johnson & Johnson.

The following certificates can be presented - in German or English:

  • Test certificate, recovery certificate, vaccination certificate (EU Digital COVID Certificates) in printed form or on a smartphone (pdf or in the green passport)
  • Officially recognised vaccination certificate (paper), vaccination card, printout of data from e-vaccination certificate
  • Medical confirmation of testing, recovery
  • Proof of neutralising antibodies
  • Certificate of isolatioin "Absonderungsbescheid"

Example images for certifications:

Image: Test result PCR test ("Alles Gurgelt!") Image: Test certificate antigen test with QR code

Image: Proof in the Green Passport (app) from left to right: valid and entitled to participate; expired and not entitled to participate;  offline, activation of internet connection or reading of info required

There are no "self-tests" offered at WU. If no proof can be provided, please refer students to the testing facilities nearby.

Contact options for questions and problems

For information on 2,5G-proofs and support for the checks, a special hotline is available to you: DW 6600 (+43 1 31336 6600).

In case of escalatioin in the classroom, please call Security DW 4000 (+43 1 31336 4000).