After a measles outbreak, sparked by a rise in the number of unvaccinated children, led to a state of emergency in the Pacific Northwest, health officials across the country in Georgia confirmed this week that three people in the Atlanta area have been diagnosed with the highly contagious virus.

None of the three were vaccinated.

Officials are once again urging immunization, particularly in the pockets that have seen a spike in parents refusing to vaccinate their children.

The disease was declared eliminated in the U.S. in 2000 thanks to a successful vaccine program, but there’s been a recent spike in reported cases, according to the World Health Organization, as vaccination rates continue to tumble.

Parents, understandably, are on edge. That’s especially true for those who don’t believe in vaccinating their children, like one mom asking for advice in the Facebook FB, +2.66% group, “Natural Health Anti-Vaxx Community.”

The responses were swift and merciless.

The post spread to Twitter TWTR, +7.09% , where it didn’t get much love either.

Jake Tapper pretty much summed up the message from the backlash:

To get an idea of the danger posed to unvaccinated children, the Center for Disease Control took a look at a four-year period starting in 2014.

Of the 1,789 measles cases in the U.S. in that time, almost 70%, or 1,243 individuals, were unvaccinated, according to data in The Guardian. The youngest were the most vulnerable, with just two of the 163 infants vaccinated.

There could be a change afoot, however.

In response to the outbreak, legislators have introduced a bill that would prohibit children from being exempted from vaccinations due to personal or philosophical reasons. As it stands now, 18 states allow for these exemptions.

“The communal rights and the ability to not have disease actually supersedes our religious rights,” Rep. Paul Harris, the prime sponsor behind the bill, was quoted as saying in the Seattle Times. “It’s very important that we protect our community and protect our children.”