Photo: Getty Images. Illustration: Chloe Krammel With a Covid-19 vaccine on the horizon, you may be wondering when and how to fully return to the office. Hold your horses. Employees are likely to get vaccinated at different times, meaning it could be weeks to months from the first to last worker's getting a jab. Health care workers and residents and staff of long-term-care facilities will likely be first in line. The goal is to fully vaccinate this group by the end of January; then, the elderly and essential workers--anyone from cops and meatpacking workers to teachers and grocery store clerks--by the end of March. That's according to Paul Ostrowski, the retired Army general who currently serves as the director of supply, production, and distribution for Operation Warp Speed.