Science is the performance of empirical or observational work to obtain evidence confirming or refuting theories.
… theories tend to be plausible statements describing something specific about how nature operates. Plausibility is in the eye of the beholder, since what is plausible to a technically knowledgeable expert may not be plausible to a lay person.
… But all the same, plausible theories are easy to believe, and that is the problem. That is what we have been fed for almost three years of the Covid-19 pandemic. In fact though, we have been fed plausibility instead of science for much longer.