Monoclonal antibody

Read this free article available from NCBI /pubmed on lateral flow immunoassays (LFIA). These common assays are part of everyday human life. (total completion time ~30 minutes).
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4986465/pdf/bse0600111.pdf
The hCG test is an example of a sandwich-based assay, where the target is immobilized between two complementary antibodies. What is this common test used for in terms of assessing human health?
What does a response on the control line indicate in a lateral flow assay?
Why is a monoclonal antibody often preferred?
What is the most common label used in LFIA?
Strep A is often detected in your health care provider’s office. Does a rapid lateral flow assay exist for Strep A?
You will need to search outside the article to look it up.