I've also read many that say it absolutely does increase the risk. And still others that say smoking marijuana "protects" you from it. Which I doubt, but if true, means I'm virtually bulletproof.
But that's the thing. With such an abundance of conflicting information, is it any wonder why people don't trust what they read? Whatever they see today will be contradicted tomorrow.
Common sense is common sense. Wash your hands and don't let anyone cough on you, and you should be alright. The rest of this is just... well, "Overkill" is being too polite.