Retroviruses are another type of virus. They have RNA instead of DNA. They infect cels and make them make copies of the virus until the cell bursts and spreads the virus. AIDS is a result of the retrovirus HIV
Lawn Fawn - Clear Acrylic Stamps - Pizza My Heart: Create fun pizza party invites or tell someone how much you love them with a special card using the Pizza My Heart Clear Acrylic Stamp Set by Lawn Fawn.