No amount of herbs or other potions are going to do any of us any good if shop assistants and the public in general don't stop coughing into their hands!
I have just been to my local post office to pick up a parcel. The woman serving me coughed twice into her hand then handed me a pen to sign for my parcel. I asked her if she wouldn't mind coughing into her arm. I told her that I was on chemotherapy.
Grrr... I have a cold at the minute.