It's not an appeal to authority to tell you to trust in doctors that have been studying and fighting infectious diseases their whole life; for me, however, the fact that so many countries have independently developed their own testing methodologies; that certain quantitative elements of the virus - e.g. transmissibility, CFR - are relatively consistent, with outliers and anomalies having additional evidence to justify their uniqueness; and the unfortunate human toll of this is undeniable.