Allergy shots are effective and safe for reducing symptoms of hay fever, according to a new review. The injection series caused no deaths and few serious adverse reactions in 51 controlled studies.Dr. Moises Calderon, of Royal Brompton Hospital in London, and colleagues evaluated the results from randomized, double-blind, placebo-controlled studies in patients with seasonal allergic rhinitis due to tree, grass or weed pollens. The studies involved 2,871 participants. [click link for full article]