Evaluates testing data sources for quality based on new tests per 1K over the last 14 days providing a preferred choice between the two sources, OWID or FIND OUTPUT:
Most recent 14-day average data points for new tests per 1K based on a procedure for picking the preferred data source
After accounting for flags, we pick OWID by default when both OWID and FIND are available in last X days
Subject to future revisions