When people hear the word 'health' they think immediately of medical matters, says Juan Michel. But health is also an issue of clean drinking water, nutritious food, a safe work environment and essential care accessible at the community level - not least in a time of flu panics.
While the impact of flu viruses and the issues surrounding them is making life increasingly difficult in Mexico, churches in the USA are seeking to respond rationally and with care to a situation where panic can be a major part of the problem.
It can be hard to quantify the benefit of having chaplains, says Mark Vernon. Their work is not amenable to a cost-benefit analysis. But that does not mean it has no value or effect, just that it has to be assessed in human rather than statistical terms.