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But when Spribille removed all the basidiomycete genes from his data, everything that related to the presence of vulpinic acid also disappeared. "That was the eureka moment," he says. "That's when I leaned back in my chair." That's when he began to suspect that the basidiomycete was actually part of the lichens-present in both types, but especially abundant in the yellow toxic one.

The chart below gives some examples of how disease levels have declined since vaccinations began. Since the introduction of the measles, or MMR vaccine, annual cases of the illness have dropped by a jaw-dropping 99%.

The rise of immunotherapy has been one of the most startling and promising developments in cancer research for some time. After decades of false starts and dead ends, scientists have finally found effective ways of marshaling the immune system to destroy cancers.

A newly developed vaccine that researchers hope will prove effective at destroying tumors in cases where all other treatments have failed is currently being trialed in the UK.

First, surgeons remove the uterus and part of the vagina from the donor - in this case, one who was deceased, since it is a risky surgery that involves separating uterine blood vessels that are tightly wrapped around the tubes from the bladder. Next, the uterus is transferred to the living recipient. Surgeons connect an artery and a vein on either side of the uterus to connect it to the recipient's blood supply. A piece of the donor's vaginal tissue is attached to the recipient's vagina, and supporting tissue is attached to the pelvis to secure the organ in place. It's not necessary to connect any nerves.