Any disease you can catch without a condom, you can catch with a condom. The chances are lower if you're wearing a condom, but they do not provide 100% protection.
Protection does not stop disease. And the protection itself can cause anaphylaxis,death.
A condom only helps protect you penis. You can still transfer diseases from hand to mouth etc.
Hey!! What does CONDOM do??? It protects BODY FLUID transfer... Like semen.. Certain infection like STD now called STI (infections) are taken due to bacteria/protozoa/virus transfer from one portal of entry (female organ) to the other (male organ) the CONDOM serve as barrier.. BUT ask this.. Its not the only portal of entry when you have intercourse.. You have your mouth.. Anus.. Etc.. It is also unto HOW you use it.. Some don't use it properly... Must have the right size.. And yes must check ALLERGIES.. Can kill you too! =) it is actually called Sexually transmitted disease because the organism lives in our reproductive organs.. The best place they can survive.. =) I suggest know your partner more!! =) thats the safest way..
You can still catch things like hiv and stds and herpes even when wearing a condoms