At the present time, it is not possible to predict how the situation will develop worldwide. It is possible that the host institution will cancel the project on its own initiative, or that there are entry restrictions for your host country at the time of your departure. To avoid unnecessary costs due to cancellations etc., you should wait with travel bookings and conclude a travel cancellation insurance. If you receive financial support through Erasmus+, you are obliged to minimize the costs. This means that you will only be reimbursed for unavoidable costs. See also the other sections.
It is essential that you observe the current regulations of the travel cost center (Reisekostenstelle) of Paderborn University for the approval of business trips during the Corona period. You can check the current regulations for example on the basis of the information of the University Borad on the coronavirus (sub-item "Business trips and general travel activities", accessible via this link).
Also check whether your travel cancellation insurance or your international health insurance includes a pandemic clause that excludes reimbursement. Please also read the others answers in the "Financing/Funding" section.
The DAAD urges travelers to inform themselves about any travel warnings issued by the German Foreign Office before they begin their trip.
When you start your trip, enter your name in the Federal Foreign Office's crisis prevention list ELEFAND (only German nationals). When you leave your host country, you must unregister accordingly.
The European Commission and the DAAD strongly urge all participants in Erasmus+ to adhere to the prevention measures of the local authorities as well as the guidelines of the host institutions.