พร่จากแหล่ง to one of the sources with the medium or carrier is a leader who does not communicate directly between patients with normal people or people who are close to.
DMA from one source to another source, the media center. Conductors or carriers This is not a contact Directly between patients with normal or close contacts.
Blessings from the one source to the next one source by medium or carrier, is in the lead, which is not เป็นการติดต่อ. The direct between patients with normal or who are very close.