Also, you'd possibly be giving an unrealistic dose in the lab. If you give someone 1000x the viral load they'd ever get in the real world, the vaccine might not

Also, you'd possibly be giving an unrealistic dose in the lab. If you give someone 1000x the viral load they'd ever get in the real world, the vaccine might not work. Or might work but send the immune system into a crazy overdrive cytokine storm.