For migrant farmworkers, language barriers and/or education level could be a barrier to understanding posted warning signs, labels and safety warnings located on the pesticides, or understanding any safety training that is provided.Other factors that may lead to greater exposure for the migrant farmworker population include: limited or no access to safety equipment, little to no control over pesticide use, cultural factors, and fear of job loss if they report potential hazards. Studies have also shown that there are some key beliefs by farmworkers that may exacerbate pesticide exposure, including the belief that "pesticides must be felt, seen, tasted, or smelled to be present; the skin blocks absorption and body openings facilitate it; exposure occurs only when a pesticide is wet;…and acute, not low-level chronic exposure is the primary danger. "This, coupled with the difficulty or uncertainty of recognizing and/or diagnosing chronic pesticide poisoning by the medical community, makes it difficult for exposed workers to receive an effective remedy. Migrant workers may also be hesitant to seek-out medical care due to lack of health insurance, language barriers, immigration status, cost, cultural factors, lack of transportation, fear of job loss, and lack of awareness of workers compensation benefits. Sergei and Yulia Skripal
In March 2018, Sergei Skripal and his daughter were poisoned in Salisbury, England, with an organophosphate poison known as a Novichok agent. Both fell unconscious while sitting on a park bench. A first responder to the scene also became contaminated and had symptoms of organophosphate poisoning. All three survived after hospital treatment.
OIG report. A group of leading EPA scientists sent a letter to the chief administrator, Stephen Johnson, decrying the lack of developmental neurotoxicity data in the review process. EPA Letter EHP article New studies have shown toxicity to developing organisms during certain "critical periods" at doses much lower than those previously suspected to cause harm.Even the restrictions which did successfully pass have been controversial. For example, in 1999 the EPA restricted the use of chlorpyrifos in households (under the commercial name Dursban). However, the EPA did not limit its use in agriculture. Chlorpyrifos remains one of the most widely used pesticides. This may soon change. On February 8, 2013, the EPA requested comment on a preliminary evaluation of the potential risks to children and other bystanders from volatilization of chlorpyrifos from treated crops

Vulnerable groups
Some populations are more vulnerable to pesticide poisoning. In the United States, farmworkers can be exposed via direct spray, drift, spills, direct contact with treated crops or soil, or defective or missing protective equipment. Migrant workers may be at an especially high risk of chronic exposure as over the course of a growing season, they may work at multiple farms, thus increasing their exposure to pesticides. Farmworkers in more permanent positions may receive more safety training and/or more "consistent reinforcement of safety behaviors than seasonal farmworkers or day laborers."