The studies & data on "health checks" -- temperature checks, symptom screening, etc -- thus far shows that it is generally considered to not be very effective.

Here are 3 studies I found quickly, but this line from [2] sums it up nicely: "... screening is resource intensive and its effectiveness is limited due to a high proportion of asymptomatic or pre‐symptomatic cases, resulting in low detection rates."

[0] - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7014668/

[1] - https://elifesciences.org/articles/55570 (includes bonus GH repo w/ data and methodology)

[2] - https://onlinelibrary.wiley.com/doi/full/10.1002/rmv.2192