Hello. Thank you for posting.
Cold sores and fever blisters are caused by herpes simplex virus type 1 (HSV-1). This virus is passed from person to person by saliva (either directly or by drinking from the same glass or cup, for example) or by skin contact. Cold sores usually appear as clusters of tiny blisters on the lip.
So, Yes, you can, in fact, contract the herpes simplex virus from a lipstick that's been infected by it. Or sharing a lipstick with someone who may have it. All beauty companies should be mindful of training their employees to use disposable tubes or swabs to apply lipstick to their customers. And as consumers, we should also be looking out for ourselves. As a rule, I rarely try on lip products in a store unless it's a one-time disposable sample.