Lethal(

Supernatural Virus ( I Did rush this so be aware, its horrible. )

1 - Gand-type : The Gand-type virus, otherwise known as a Breather on the field.
(Stage 1 ) They mostly appear human, same human skin, eyes, hair, body. Their neck and chest is what makes them stand out, their lungs slowly grow and so does their chest. ( The lungs and chest grow slowly, only noticeable when  this part of the stage lasts about 2 years. They can die from this due to their lungs getting impaled on their own ribcage. ) They find it harder to breath, breathing heavily almost all of the time un-able to control it. If they attempt to control their breathing they can suffocate themselves due to loss of air. The reason for this is yet to be found out.
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Bumps start appear on their neck.. these bumps are what appear to be vocal cords and glands, theses will start to appear after 2 months after 2nd year of the Gand-type. Their breathing becomes slightly polluted with the virus, leaving a sort of un-visible gas that can infect people who breath it in in large quantities. The bumps can last to 2-5  months growing, after that (stage 2) of the Gand-type virus starts.  Their neck starts to grow longer, as their head grows slightly.( The head and neck grow rapidly, causing them to be in a state where they constantly have to eat. ) They have severe memory loss, identity death is common at this point, new memories cannot be formed after this point making it impossible for recovery without curing the virus.