Székely , AndrásBaiden, Phoebe2024-04-262024-04-262024-02-22https://hdl.handle.net/2437/369320A three-wave pattern of reported cases affected several countries around the world. The first wave happened in the spring of 2020. The second wave occurred at the end of summer 2020 and fall 2020. The third wave occurred at the start of 202148enVaccineMedicineHozzáférhető a 2022 decemberi felsőoktatási törvénymódosítás értelmében.