As with every thing from the right wing, this is not as simple as you wish it to be.. not as bad and yet a real problem..

read the article.. excerpts from parts.. also check a story in the Washington post for prospective.. I do not subscribe so I can not C & P... sorry about that..

https://www.capradio.org/articles/2021/04/15/fact-checking-claims-about-c****-**-testing-for-migrants-at-the-southern-border/

On the veracity of those claims

PolitiFact found there is no definitive answer available since there are different categories of migrants being tested at different times and by varying groups across the border.

But back in March, the head of the Federal Emergency Management Agency told lawmakers that the positivity rates for people coming across the border at the time was less than 6%. For some comparison, the average positivity rate in Texas was above 7% at that time.

On testing migrants for C****-** and who is doing it Nice try permafrost you gave a report from March , this is August, also I was talking about South Texas. Not California. All the best!

Immigration authorities said they are working with state and local authorities and non-governmental groups to make sure that all migrants are tested “at some point during their immigration journey.”

Federal health officials say that the many unaccompanied minors who have arrived are tested every three days — those who test positive are isolated from the rest.

Customs and Border Protection personnel do initial checks for symptoms, and they consult with onsite medical staff. People who are presumed to be sick are sent to local health systems for testing, diagnosis and treatment, according to immigration officials.

Cities, counties and nonprofits handle the vast majority of the testing and any subsequent isolation.