The review of 88 studies shows the shots can significantly reduce asthmatic symptoms and the amount of medication needed in some people. They also helped reduce sensitivity in the lungs, and in some cases worked as well as an inhaler.
But there's a catch: there is also an increased risk of side effect from a stuffy nose to fatal reactions like anaphylactic shock.
Patients should work closely with their doctors to determine what is the best and safest treatment for their individual situation.
