No one is ever sure what the result will be when a new drug or vaccine is rolled out. These covid vaccines just have a little more uncertainty behind them than most other drugs.
Scale and intent don't matter.
well, intent very much matters to the question of whether it's an experiment or not. If you're handing out the drug just to study the effects, it's an experiment. If you're handing it out to achieve the drug's practical effects (albeit with a degree of uncertainty about it's efficacy) it's a practical application.
No one is ever sure what the result will be when a new drug or vaccine is rolled out. These covid vaccines just have a little more uncertainty behind them than most other drugs.
well, intent very much matters to the question of whether it's an experiment or not. If you're handing out the drug just to study the effects, it's an experiment. If you're handing it out to achieve the drug's practical effects (albeit with a degree of uncertainty about it's efficacy) it's a practical application.