The new and improved vaccines which will most likely arrive in around a year rendering the current obsolete, and will be next years final mission.
Vaccinate this year with the first concept.
Vaccinate next year the bullet proof version 2.
2023 onwards it starts to die off.
Xmas of 2023 we are in the green. Full steam ahead.
25/26 recruitment should start to pickup in this industry. Concerns around pilot numbers probably a few years before entering the next decade.