Yes you are still contagious.
Your girlfriend should stick to liquids (small sips) and dry toast! From personal experience, I think if you were going to get sick, you wouldve by now but everyone is different! She will contagious for 2 days after she stops being sick! Good Luck!
Of course
It depends on the conditions. If you are near the person during the time and the disease is contagious, you can also get the disease that is passed onto you. You won't get sick if you stay a distance from the sick person, so the disease can't be passed on you if it's contagious.
YES!
You can sleep when you are sick by taking medicine made especially for nighttime use.
my girlfriend feel tired and sick
Many including Pneumonia are contagious to other guinea pigs, if you have suspicions that your guinea pig is sick separate it from the others just in case they get it. But if you are thinking contagious to humans than the answer is no.
A virus can be contagious by contact or being in the same atmosphere of a sick person.
Find out if its contagious and if it is then no but if not it shouldn't be a problem.
It depends if you're friend has a contagious sickness. If he does, you can catch it. Ask a doctor on details more in depth or if you're friend 's cold is contagious.
It depends how sick/contagious they are most of the time.