2020 Q2. Pandemic onset. Frontline service occupations show a sharp rise in workplace risk, economic downturn and high unemployment limits exit options.

2020 Q4. Late 2020. Risk stays elevated for low-leverage occupations but broader labor market begins to stabilize.

2021 Q1. Early 2021. Vaccine rollout shifts some occupations out of the danger zone.

2021 Q4. End of 2021. Covid variants maintain risk of infection at work high but low unemployment and record high job openings give job seekers high leverage.