Spray Flu Vaccine Comes at a Trickle Finding FluMist may not be easy in coming weeks, despite the fact that MedImmune had produced 2 million additional doses in light of the vaccine shortage.&lt;FONT face="verdana,MS Sans Serif,arial,helvetica" size="-2" color="#666666"&gt;&lt;B&gt;-washingtonpost.com&lt;/B&gt;&lt;/FONT&gt;