Defense lawyers often want to avoid the risk of exposing their clients to hostile and potentially damaging cross-examination.
"If you have clusters of exemptions, you increase the risk of exposing everyone in the community," said Dr. Omer, who has extensively studied disease outbreaks and vaccines.
The most compelling reason for the no-contact policy is the risk of exposing these people to diseases for which they lack immunity.
The most dangerous use of diazinon is in the home, the agency said, because of the risk of exposing children to it.
Children, being the curious little monkeys they are, are keen to mimic their parents, but some activities, like texting, run the risk of exposing children to potential harm.
The e-mail from Louisiana acknowledges as much: "From a medical perspective, asymptomatic individuals are not at risk of exposing others".
Broadcaster NHK said attempts to vent radioactive gas to lower the pressure had been suspended because the radiation level on one valve was higher than expected, heightening the risk of exposing workers to radiation.
To talk about something that's so emotive at a deeply personal level feels like it runs the risk of exposing something about yourself that you don't necessarily want everyone to know about, or to judge you in terms of.
The results, the researchers said, suggest that the mice are assessing the risk of exposing themselves to possible predators both in choosing where to forage and how much time to spend doing so.
Asked about this, Jean Glavany, France's agriculture minister, said recently that French farming was "so fragile that we cannot take the risk of exposing it to an extra epidemic".
However, to some Eurosceptics, even this eminently practical instrument is tainted by its connection with Brussels and – they say – the risk of exposing British citizens to trial in countries with less robust justice systems.
