John Brecher / NBC News  In a letter dated November 5, to Kevin McAleenan, Acting Director of the Ministry of Homeland Security and Alex Azar, Secretary of Health and Human Services, the doctors said that they had 100 to Doses of influenza vaccines and four volunteer doctors would be available to administer them. McAleenan resigned and Chad Wolf was appointed the new acting secretary of the DHS.
"This is how epidemics begin," said Dr. Luz Contreras Arroyo, a member of the group and signer of the letter, told NBC News. "It's not just migrants, the workers will come to the communities and possibly spread the virus, and it could get out of control."
"These are also human beings," added Arroyo, speaking of the imprisoned families. "They are under the custody of the government, most have not committed any crime, seeking asylum is not a crime."
The Morning Rundown
Get a head start on the most important stories of the morning.
The group had given the administration a Tuesday deadline to respond before the application was published.
The doctors warned that migrants are not the only people threatened by illness.
"The flu season has already begun in large parts of the country, we write with urgency," said the doctors. "Many people, including those working in and around CBP facilities, are at even greater risk than usual."
The doctors donated money and collected more from friends and others to pay the cost of the vaccines. According to Arroyo, a family doctor and psychiatrist in Sacramento, doctors volunteer their time to administer the vaccines.
The physicians said they also maintain a volunteer network of doctors who are licensed in all states to obtain and work with the necessary vaccines. CBP is supposed to "create a system that ensures that the majority of doctors have the right care vaccinated in CBP-detained migrant families ".
They hope the government finances the cost of vaccines systemwide. If not, they will try to find another funding.
"Alarming Mortality Rate"
The doctors said that based on an estimated 200,000 children in federal custody in the last two years, the three deaths of imprisoned children are due to complications. The number of flu-affected children is nine times higher than the expected number of flu-affected children.
"According to our medical assessment, this alarming mortality rate represents an emergency that endangers the safety of people, especially children," says the letter signed by seven doctors.
In August, CBP announced that they would not vaccinate migrant families in their detention centers prior to the flu season. At the time, the agency said in a statement that it did not want to provide the vaccinations because of the "short-term" stays of immigrants in custody and the complexity of running a vaccination program.
But Arroyo said The government has previously carried out large-scale vaccinations and spent large volumes of vaccine to prevent the spread of disease and epidemics. She said it was cost-effective and less than the cost of hospitals and intensive care units for detainees, staff and residents when they get sick.
CBP's cells and pins, made of chain-link fence with concrete floors and lounges, are known to be very cold and are often referred to as Hieleras, which is reflected in the freezer or cool box.
Healthcare providers have protested against prolonged migrants' imprisonment and warned that children in particular would be at greater risk for extended incarceration.
Overfilled conditions worsen the risk.
Doctors operating the influenza vaccine clinic found that the DHS Inspectorate in detention facilities had detected overcrowded and unhygienic conditions CBP facilities had no access to showers, did not always have the option to change clothes, and they had limited space for medical isolation. According to NBC News, there were 155 people in a cell in El Paso that housed 35 adult men with only one toilet and a sink.
A flu outbreak at CBP McAllen's facility affected nearly three dozen immigrants and required a temporary interruption of operations.
Centers for Disease Control recommend that anyone over 6 months of age receive a flu shot for the current flu season by the end of October. Even the Guide to the Office of Citizenship and Immigration, which is part of the Department of Homeland Security, mentions the CDC's call to vaccinate immigrants to the flu.
"As physicians, we have seen the effects of both flu and strongest on the strongest and most vulnerable and the results can be devastating," said the doctors.
Follow NBC Latino on Facebook, Twitter and Instagram.