In a world where vampires are relatively common, composing 5-25% of the population, one of two things needs to happen:

1. Knowing Acceptance-People know there are bloodsuckers with superhuman attributes (strength, speed, senses, and the like) and are totally okay with it. Okay, maybe some people are anti-vampire, but on the whole, humans get along with their fanged counterparts.

2. Hiding In Plain Sight-Modern-day vampires use our views on tolerance, acceptance, and so on to their advantage, claiming their fangs and odd quirks (like garlic allergy) are due to a genetic condition. This allows them to make the people claiming that they are real, supernatural beings that pose a threat to humanity not only look crazy but outright bad for discriminating against their genetic condition!

I chose 2, but then we have some problems. Not the whole vampires-need-blood-thing, that was dealt with via this question, but then there's all this left:

1. Vocalizations-For some reasons, vampires vocalize often, giving out a (circumstance-specific) cry when pained, alarmed, or distressed. These vocalizations include purring, shrieking, howling, and roaring. Vampires vocalize less often around regular humans, but people are still going to notice that people with fangs make odd noises.

2. Blood Attraction-Vampires react when blood is shed near them. A vampire who's disciplined or well-practiced will only display dilated pupils, tension (their body will tense, even if only slightly), and will seem distracted. However, a vampire who lacks discipline will fixate and/or move towards the wound, and there's a good chance they'll bare their fangs or have an open, watering mouth. In other words, anyone paying attention should realize vampires are attracted to blood. Without a good explanation for this, people will be likely to throw in their lot with those claiming vampires are a real threat to humanity.

3. Imprinting-If a vampire has taken blood from someone for up to a year, they Imprint on that person. Vampires are very protective of their Imprinted, and have a tendency to get possessive of said Imprinted. They can sense this person's location and emotional state as well. Now, vampires are hardwired to take blood from the opposite sex, so this could very well look like two people in love, even considering the tendency Imprinted vampires have to follow and stay close to their Imprinted. Even a vampire's ability to apparently know where their Imprinted is and how they're feeling could potentially be interpreted as "they're soulmates, don't question it."

4. Territorialism-A side affect of the magic behind a vampire's inability to enter residences without invitation. Basically, vampires feel very strongly about privacy and are clearly territorial, saying things "like don't touch my desk" and "stay away from my stuff" often. This is probably easy to explain away as a culture thing, but it may also make people feel "that guy's hiding something, and I'm gonna find out."

5. Garlic allergies-Some, not all vampires are allergic to garlic. Vampires can't be allergic to anything except garlic, and like IRL allergies, garlic allergies are common and vary in intensity.

6. Supernatural traits-Vampires are unusually fast, strong, and agile, making it relatively easy for the average vampire to get up to an open window on the second floor of someone's house. This of course will make it clear something is off about people with fangs, but a vampire's night vision and ability to smell blood? That's just pushing it. Granted, most vampires will be smart enough to hide it, but I feel eventually some idiot will let the cat out of the bag, saying something like "Oh yeah, all vampires have enhanced senses, not to mention strength, speed, and agility, but our sense of smell and night vision is especially acute."

7. Vampirization-This is the most important thing to cover up. It's only a matter of time before it happens, and making someone disappear just because some vampire couldn't control themselves will only arouse suspicion. However, anyone close to such a victim will notice that they now have fangs, enhanced attributes (see 5), seem attracted to blood and are suddenly private and territorial, vocalize weirdly.....basically, that something weird has happened.

So far, the best idea I have is that vampires can claim viral or bacterial DNA transfer as the cause of their odd traits, which would make it contagious. (This is a real thing, by the way, so it's at least semi-plausible). Considering all the traits above, this viral or bacterial vector should probably come from a cat.

Thus, my question is: What is The Best Way to Hide Vampires In Plain Sight?

Specifications For Best Answer:

1. The best answer will have one or more possible methods that will enable vampires to, as I said, "hide in plain sight."

2. The best answer will also take into account the listed quirks of vampires and have well-thought-out ways to cover them up or account for them so they don't draw the ire and/or suspicion of regular humans.

3. Finally, the best answer will analyze the reality of viral/bacterial gene transfer (which has happened across species boundaries) and how likely it is that a vampire's unusual traits, like blood attraction, Imprinting, enhanced senses and agility, and what not could be explained by cat genes transferred in this way. If it isn't plausible, the best answer will have either a *plausible *modified version (like a crazed scientist creating a virus to make people more like cats, which is only plausible because truth is stranger than fiction and insanity is a good friend of humanity) or another explanation altogether.