The inoculations performed with this weakened strain on the imperial family were successful, and led to greater public acceptance for the procedure.

Russia uses an older vaccine technology, inoculating people with live spores of a weakened strain of anthrax.

Dr. Cherkassky asserted that the Russian vaccine was safe because the spores came from the weakened strain.

The new, monovalent vaccine contains a weakened strain of Type 1 polio virus only.

They have also raised the theoretical concern that the vaccine, which consists of a live weakened strain of the chicken pox virus, might itself cause symptoms.

The vaccine contains a live weakened strain of the chicken pox virus that causes an infection that produces no symptoms.

It took years to prove that the weakened strain did not revert to a virulent form.

The vaccine is made from a weakened strain of the anthrax bacteria and provokes an immune response.

Glaxo's is made from a weakened human strain, and is delivered in two doses.

He felt the weakened magic strain and snap.