If she has a herpes infection olive leaf extract may work. It takes at least 6 months to be effective from what I have read and in my experience. Most people seem to stop taking it as soon as it makes them more sick, which is part of the healing process. It took 6 full months of cycling through all my symptoms, and then one day I woke up feeling good. I plan on taking a maintenance dose for the rest of my life to prevent recurrence.
JAM, Olive leaf extract also strengths the gut flora:
It is proposed that the polyphenol compounds in olive leaf extracts were responsible for the stimulation of probiotic bacteria growth and metabolism and that olive leaf extracts ingested in human diet might have the same effect on desirable components of the intestinal microflora
http://www.pjbs.org/pjnonline/fin1782.pdf
and is antimicrobiell:
In conclusion, olive leaf extract was not broad-spectrum in action, showing appreciable activity only against H. pylori, C. jejuni, S. aureus and MRSA. Given this specific activity, olive leaf extract may have a role in regulating the composition of the gastric flora by selectively reducing levels of H. pylori and C. jejuni.
http://www.ncbi.nlm.nih.gov/pubmed/19135874
Regards, jepps