Experts say that most drugs work for only about half the people who take them.

Experts say that most drugs, whatever the disease, work for only about half the people who take them.

Experts say that most drugs, whatever the disease, work for only about half the people who take them.

Experts say that most drugs, whatever the disease, work for only about half the people who take them.

A start-up company called Complete Genomics says it will start charging $5,000 next year to determine a person’s complete genetic blueprint.

Sergey Brin, a Google co-founder, said Thursday that he has a gene mutation that increases his likelihood of contracting Parkinson’s disease.

Two closely watched companies that offer consumers information about their genes have received licenses that will allow them to continue to do business in California.

Details on Elan and Wyeth’s new Alzheimer’s drug show it raised risks of a potentially serious side effect, but may help those who do not have a genetic risk for the disease.

Flurizan, a drug developed by Myriad Genetics to treat Alzheimer’s disease, failed in a closely watched late-stage clinical trial, dealing another blow to efforts to combat the illness.

Regulators are cracking down on companies that sell genetic tests directly to consumers, threatening to crimp the growth of one of the hottest sectors of the biotechnology industry.