Anti-vaxxers and air pollution have been listed as part of the World Health Organization's Top Ten Threats to Global Health.
When it comes to air pollution, the report states nine out of ten people breath polluted air every day, making it the greatest environmental risk to health.
WHO officials say 7 million people die every year from diseases caused by microscopic pollutants such as cancer, stroke, and heart and lung disease.
Meanwhile, when it comes to vaccinations, officials warn 1.5 million deaths could be avoided if global coverage of vaccinations improved.
Notably, measles has seen a resurgence.
The Centre for Disease Control states measles was declared eliminated from the US in 2000, but right now New York is dealing with one of the worst outbreaks in centuries.