Reads to me like the eggheads are on to something...
Honey: its medicinal property and antibacterial activity
...The antimicrobial activity in most honeys is due to the enzymatic production of hydrogen peroxide. However, another kind of honey, called non-peroxide honey (viz., manuka honey), displays significant antibacterial effects even when the hydrogen peroxide activity is blocked. Its mechanism may be related to the low pH level of honey and its high sugar content (high osmolarity) that is enough to hinder the growth of microbes. The medical grade honeys have potent in vitro bactericidal activity against antibiotic-resistant bacteria causing several life-threatening infections to humans...
You can buy cough drops that have Manuka honey in them. Pricey but good.
Am not interested unless the study also tested using regular honey as a control.
Regards,