I think you misunderstood what I said. The first cited article quotes the CDC as saying there IS an increased risk of infectious disease arising out of immigration, particularly from Mexico. From the article:
“The sheer number of people who live, work, and travel between the United States and Mexico has led to a sharing of culture and commerce, as well as the easy transportation of infectious diseases,” CDC writes on its website. “The large movement of people across the United States and Mexico border has led to an increase in health issues, particularly infectious diseases such as tuberculosis.”
For this reason, CDC and its Mexican counterpart have established a disease-surveillance infrastructure on the border.
CDC specifically cites the possibility of the cross-border movement of “HIV, measles, pertussis, rubella, rabies, hepatitis A, influenza, tuberculosis, shigellosis, syphilis, Mycobacterium bovis infection, brucellosis, and foodborne diseases, such as infections associated with raw cheese and produce,” though vaccination has helped reduce the risk."
I’ll grant that others in the article challenge that. But one has to assume the CDC didn’t just pull that out of nowhere. And directing me to prove or disprove that the CDC is right is a real stretch. If one wishes to dispute the CDC, it’s his/her obligation to show why the CDC is wrong. And a couple of statements by medical practitioners seems rather short of that to me. In the second article, there’s no authority given at all.