Y

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Yag laser surgery: a light laser that makes a hole in the eye to relieve the pressure that is caused by glaucoma

Y Chromosome: male determining. The human male has one X chromosome and one Y chromosome

Yeast Infection: fungal infection called Candida. It is usually found in the mouth or vagina and is more commonly known as thrush

Yellow Fever: an acute illness caused by a tropical mosquito bite

Yellow fever vaccine: live vaccine given to travellers or to people living in tropical areas where yellow fever occurs

Yellow nail syndrome: total absence of nail growth and a thickening of the nail

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