The Covid-19 restrictions on the external border of Poland are still in force. Foreigners who want to cross the border must follow the restrictions and the quarantine requirements. You may refer to the following link Poland?> to check if you are allowed to enter Poland.
For international students, you can enter Poland if you are:
A student studying in Poland and as well as if applicable your legal guardian who crosses the border with you to enable your studies,
A student, or a participant of postgraduate studies and specialized training and other forms of education, or a doctoral student studying in Poland,
A scientist conducting research or development work in Poland