This is quite amazing:
Two randomised controlled trials tested the effect of remote
intercessory prayer (praying for persons unknown) on outcomes in
patients admitted to an intensive coronary care unit.1,2 Both studies showed a beneficial effect...
The purpose of the present study was to extend these observations to
patients with another severe disorder, bloodstream infection. As we
cannot assume a priori that time is linear, as we perceive it,4 or that God is limited by a linear time, as we are,5 the intervention was carried out 4-10 years after the patients' infection and hospitalisation...
Remote, retroactive intercessory prayer was associated with a shorter
stay in hospital and a shorter duration of fever in patients with a
bloodstream infection. Mortality was lower in the intervention group,
but the difference between the groups was not significant. A larger
study might have shown a significant reduction in mortality.
Read about the study over here.