Before revision: The world is waiting for a vaccine to mitigate the spread of SARS-CoV-2 . However, once it becomes available, there will not be enough to vaccinate everybody at once .
After revision: The world is waiting for a vaccine to mitigate the spread of SARS-CoV-2 . However, due to limited production capacities and logistical challenges it will take months/years until herd immunity is achieved .