Development of a T Cell-Based COVID-19 Vaccine Using a Live Attenuated Influenza Vaccine Viral Vector oleh Irina Isakova-Sivak, Ekaterina Stepanova, Victoria Matyushenko, Sergei Niskanen, Daria Mezhenskaya, Ekaterina Bazhenova, Elena Krutikova, Tatiana Kotomina, Polina Prokopenko, Bogdan Neterebskii, Aleksandr Doronin, Elena Vinogradova, Kirill Yakovlev, Konstantin Sivak, Larisa Rudenko