Pill packages have active pills (with hormones) and placebo pills (no hormones). The number of placebo pills can vary depending on the type of pill used. Your menstrual period should occur during the placebo pills due to lack of hormones. You are still protected from pregnancy during the placebo pills.
Making the Case against the biting midge: evidence is building that the biting midge, Culicoides sonorensis, is a vector of vesicular stomatitis virus (VSV), which causes significant economic losses in cattle, horses, and swine.
Recombinant vesicular stomatitis virus (VSV) is an attractive viral vaccine vector candidate because of its very low VSV seroprevalence in humans, its ability to infect and robustly express foreign antigens in a broad range of cells, and its ability to infect after mucosal inoculation .