Article content We apologize, but this video has failed to load. Try refreshing your browser, or Jarvis: There will be a fourth wave if more people don't get vaccinated Back to video The warning came as the region’s top five doctors, led by Medical Officer of Health Dr. Wajid Ahmed, wrote an open letter to the community begging everyone ages 12 and older to get vaccinated. “This is a critical time in our fight against COVID-19, and if we as a community grow complacent, the risk of further health, social well-being, and economic impacts could be grave,” states the letter, also signed by the chiefs of staff at Windsor Regional and Erie Shores HealthCare, Hotel-Dieu Grace Healthcare’s vice-president of medical affairs and the president of the Essex County Medical Association.