Tijuana's health department revealed migrants were suffering from tuberculosis, chickenpox, skin infections and hepatitis.
The criticism came after the president told reporters to take their cameras into the middle of the caravan, adding that there are MS-13 - many news outlets then criticized President Trump for the lack of evidence in his statement.
"A handful of the thousands of Central American migrants camped out at the U.S". There are only 35 portable restrooms at the site.
The MSNBC reporter on scene claims that after speaking with migrants biding their time in shelters near the border, that numerous would-be asylum seekers were told that crossing the border would be a relatively painless process, and that majority would be eligible for available work programs created to help them integrate into American culture and society.
Migrants from the caravan staying in Tijuana, Mexico and awaiting entry into the U.S. are suffering from all kinds of illnesses, ranging from ordinary respiratory infections, to unsafe diseases such as tuberculosis and HIV/AIDS, the city's health department reported on 29 November.
Most migrants hope to gain asylum in the United States, but face months of delays.
With the added large numbers of migrants coming from Central America to seek legal U.S. entry and claim asylum, Perez said, the general two days it takes CBP in San Diego to process people could increase to five or six weeks.
"They make the decision for a variety of reasons", Ivonne Aguirre, a program coordinator with the International Organization for Migration, which is assisting migrants with returning home, told the Washington Post.
The Mexican government called for an investigation after the U.S. authorities fired "non lethal" weapons on migrants during Sunday's violence. "Some have sick relatives, some miss their families, some are surprised by the conditions here, which are not what they imagined".
Hondurans, Salvadorans, Guatemalans and Nicaraguans are among those giving up and heading back to Central America with little hope of entering the US.