COVID-19: Why Nigerians should not travel this yuletide On By Sola Ogundipe & Juliet Muoghalu As Nigerians join the rest of the world to celebrate the availability of effective COVID-19 vaccines, human behaviour is expected to continue to drive the spread of the virus until the vaccines are widely available. Although it is cheering news that at least two of the COVID-19 vaccine candidates have been approved, they are not yet widely available, hence Nigerians need to appreciate that vaccine protection is a long process and that a vaccine is not a magic bullet that would make the infection disappear in an instant.