Entos Pharmaceutical’s COVID-19 vaccine has been shipped to the Canadian Centre for Vaccinology in Halifax to begin clinical trials. It was developed jointly between the Edmonton-based company and the University of Alberta. The vaccine is DNA-based, unlike the messenger RNA (mRNA) vaccines currently in use in Canada, and comes with several advantages. It can be stored at regular refrigerator temperature for up to a year, and researchers are optimistic it will only need to be given as one dose.