Healthcare Why we shouldn’t have unrealistic expectations regarding COVID-19 vaccines Updated : June 09, 2020 06:28 AM IST Vaccines can take a long time to be developed, longer than most pharmaceutical, medicinal or drug products. The inherent complexities of vaccine development cannot be ignored. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.