"Gilead Sciences (NASDAQ: GILD) develops treatments for life-threatening diseases and specializes in drugs for HIV, the virus that causes AIDS," notes Hannah Choe.

The contributing editor to Personal Finance explains, "Already the market leader in HIV antivirals, Gilead is in the beginning stages of developing Quad, the first-ever, four-in-one AIDS pill.

"The manufacture of HIV drugs, which accounts for more than three-quarters of revenue, is Gilead's highest-grossing business. This segment has held up through the recession; in the second quarter product sales for the antiviral franchise grew 26% from a year ago to $1.41 billion.

"Gilead Sciences (NASDAQ: GILD), one of the world's largest biotechs, is a stock for all seasons," say growth expert Alexander Green.

The investment director for The Oxford Club explains, "It's a fine company with a solid balance sheet, a recession-proof business and excellent growth prospects."

"Gilead focuses on three main areas, including cardiovascular conditions and respiratory diseases. (Many may have taken its anti-influenza drug Tamiflu, Letairis to treat hypertension, or Macugen to treat macular degeneration.)