I have purchased a bottle of mouthwash yesterday that was sealed in a box. I opened the box, took out the bottle with mouthwash, used it, and afterwards noticed that on the side of the bottle and cup there were brown stains. With some effort I could wipe off the stains. I think it was blood. No idea how it could get on there, apart from someone during the manufacturing process touching the bottle with a cut on his/her finger.  Expiry date on the bottle stated as 07 (July) /2020, it does not contain alcohol, so I assume the bottle was made on July/2018,.as it probably has a 2 year shelf life since there is no alcohol as a preservative. So, around 3,5 months ago, I assume, blood got onto the bottle since it was sealed in a box when it left the factory. 

Here is the main question: if his/her blood on the bottle touched a cut on my hand or got into my mouth (if it was in the mouthwash or inside the cup which i used to pour in the liquid) would I be at risk for HIV and HEP C . I am a little worried, as I do not understand those viruses too well, and internet has so much conflicting information. Do I need testing based on this incident? Absolutely no other risk behaviour on my part.  

Thank you very much

I would also suggest you stay off the internet for advice related to HIV, hepatitis, and other STIs as much of what is said there is taken out of context, out of date or just plain wrong.

I hope my comments are helpful to you.  EWH

Last question if I may, please. I saw someone here posting question about spread of HIV, and saw a name of an PhD immunologist Jennifer Sempala who claims HIV virus does not die within seconds/minutes after contact with air. So it is quite easily spread. 

But I thought it was incorrect. Or am I wrong? I am just trying to understand.  Does HIV die very quickly, in a matter of seconds/ minutes or did I misunderstand? 

 And she just scares people for some reason only understood by her? Thank you again and have a great day. 

The statement about how easily HIV i spread is a misstatement that is not accepted by nearly all scientists who work in the field.  HIV does become non-infectious virtually immediately upon exposure to the environment.  For instance, multiple high quality studies evaluating millions pf people have shown that HIV is not spread by casual contact, kissing, and other non-penetrative sexual activities.  I wish I understood why some people choose to alarm others with misinformation to the contrary.  

Thanks for your thanks.  I hope you have a nice day as well.  EWH