Hello Juan,
Thank you for your query at DoctorSpring.com
I understand your concern.
As such, sharing drinks with someone has low chances of transmitting infection. However, some infections that can possibly be transmitted is herpes ( very rarely ), if someone has an open sore, and hepatitis a, not b. Hepatitis B is transmitted only through contaminated blood transfusion or through infected needles.
Hope this was helpful,
Feel free to discuss further.
                                                    
                                                    
                                                    
                                                 
                                            
 
                                            
                                        
                                            
                                            
	
                                                
                                                    
                                                    Patient replied : 
                                                    
                                                    
                                                        As far as hep a, what should I be looking out for? And what are the worst-case symptoms associated with it?
                                                    
                                                    
                                                 
                                            
 
                                        
                                            
	
                                                
                                                
                                                    
                                                        Normally hep a and hep e are water-borne and can be transmitted through contaminated drinks. But the incidence is low. 
So, it is better to avoid sharing drinks with anyone. 
Regards.