Assuming that flu viruses did not come up with this policy, here are the problems.
Source: No Flu Vaccines For Detained Migrant Families? Why This Is Wrong
This week’s rain and humidity could mean faster breeding for mosquitoes. “If we get rain, the rain where the water sticks around, laying in tire ruts and things of that nature and then with the extreme heat after, they come off pretty prevalent,” Marcus Snyder, a Cumberland county public health technician, explained. “They” meaning mosquitoes, the small insects that always seems to find your arms and legs this time of year.
Source: A look at disease-carrying mosquitoes and the West Nile Virus so far this year | WHP