Study actually underestimates the problemThe researchers warned that the nagging problem is most likely far worse compared to the raw data suggests. That’s because no more than 10 % of the world’s agricultural surface area waters were contained in the research. Additionally, pesticide contamination of freshwater in agricultural areas is commonly seasonal, with periodic spikes that last just a few days and are consequently hard for researchers to detect. Studies have shown that these brief spikes can possess devastating effects on aquatic ecosystems.Related StoriesNew study may offer approaches for developing toxoplasma-inactivated vaccineGHIT Fund invests $10.7 million to fight malaria, TB, leishmaniasis and dengueAnalyzing potential TB vaccine For example, the herpes zoster vaccine has been recommended since 2008 but is not widely stocked by doctors. One major reason behind this, the study says, is that zoster is usually included in Medicare Component D, a pharmaceutical benefit, and physicians report problems with reimbursement. Simultaneously, the vaccine can require substantial out-of-pocket costs for patients, rendering it less appealing to them as well. Due to these difficulties, many physicians are referring sufferers to pharmacies or general public health facilities for vaccinations. ‘The most commonly reported reasons for referring patients somewhere else for vaccines included insurance not covering the vaccine,’ the study said.