Lawful: Law must serve and respect society, otherwise it is tyranny. Effective: Vaccine may be effective in reducing some effects of covid, like the many other methods that have been killed since they where not profitable. Vaccine have side-effects that must be taken into account Science: A word that means "being able to predict outcome / future", something current batch of vaccines fails quite a bit, do they do something ? yes. Are there reasons for individual to refuse them ? yes