Health Minister Fahrettin Koca announced that the Sinovac company did not send the 100 million doses of vaccine it should send. The available Sinovac vaccines are used in the second dose, and for the first doses, appointments are made only for the BioNTech vaccine. So, will the 28-day period between two doses of BioNTech vaccine be extended to increase the vaccination rate? Can BioNTech be applied in a single dose to vaccinate more people? Melike Şahin from the NTV team, answered these questions by Feriha Öz Emergency Hospital Chief Physician Prof.Dr. Nurettin spoke to Yiyit.