The word vigil comes from the Latin word vigilia, a noun which refers to the act of staying awake and alert in order to protect, guard, or look after something. In English we refer to this activity as keeping watch.
STAPHYLOCOCCAL ENTEROTOXIN B Bioterrorism Agent Profiles for Health Care Workers Causative Agent: Staphylococcal enterotoxin B (SEB) is one of seven enterotoxins produced by strains of Staphylococcus aureus. Routes of Exposure: Humans are primarily exposed to SEB by consuming contaminated food.
SSB (single sideband) is a mode where the carrier and one sideband of the AM mode has been suppressed. Whether using USB (upper sideband) or LSB (lower sideband) more of the transmitter's signal is focused in the sideband used as compared to AM.