Are migrants coming to US for free healthcare?

Jeff Dunetz:

U.S. Customs and Border Protection (CBP) agents are calling for medical help from the CDC, Coast Guard, and the Pentagon to screen illegal immigrants and they’ve asked American and Mexican disease specialists to investigate the surge of sick migrants caught at the border after another illegal immigrant child died in U.S. custody. None of those steps will solve the illegal alien health crisis that few people are talking about.
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A DHS official told reporters that “literally dozens” of sick migrants are being transported to hospitals across the border each day and that growing numbers of children showing illness are present in border patrol custody. Given their young age, children will be most susceptible to disease. Anyone who has been a teacher or a parent knows that young children can be like little petri dishes when it comes to some illnesses.
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It does not help that these kids have been kept in unsanitary conditions while making their trek through Mexico.  Mexico is also notorious for water born diseases which tend to effect the non-native population which lacks the immunity built up over the years by native Mexicans.

I would not discount the idea that one of the reasons these people are trying to get into the US is the chance at "free" healthcare and social services.