Did all the extra credit, then got graded on a curve
Excellent, clear write-up. Thank you very much. And congratulations on the new job.
"only having PCR tests meant that the results were only available a few days later"
This was partly a choose as it was chosen to be fair and process tests in the order they arrived. If it was chosen to always process the most recent sample 1st, and to verify the most recent result results 1st then many of the results would have been miuh quicker.
(Likewise with tracing all the resource should have been used on cases with the most resent start of symptoms.)