What is the main cause of SCD?

Can spitting at or on someone make them sick? Is blood thicker or thinner in winter? What is the size of prostate in the healthy man? Which syllable has the secondary stress in babylonia? How painful is an electric shock? Does the epiglottis prevent food from entering the windpipe? what two vital signs are directly related to the heart? What are the bones of the wrists and ankles classified as? Do guys get erections in the showers? Who wrote panic attack song? What neurotransmitter is deficient in Parkinsons Disease? Can you get pregnant after having syphilis? If you have your period and you play with yourself and your brother is playing with u like playfighting and is on his puberty can you get pregnant? What does it mean to have impacted wisdom teeth? When blood flows into the right atrium of the body it has little? What are 5 important components of the dermis? Is it normal for a guy to put his legs above is head and start touching himself? What does omphalophobia mean? When should i finally diaper my teen for for bed wetting? What is the definition of a preexisting condition?