A California company named Aviron has developed a nose-drop flu vaccine, but with only “attenuated” (weakened) viruses rather than killed strains. Zakay-Rones maintained that killed-virus vaccines are safer.
Israeli flu vaccine comes in nose drops
A California company named Aviron has developed a nose-drop flu vaccine, but with only “attenuated” (weakened) viruses rather than killed strains. Zakay-Rones maintained that killed-virus vaccines are safer.
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