* قد تكون صعبة التنقل بسبب ضرورة حفظها في ظروف معينة ("مثل" درجة الحرارة)* Global Polio Eradication Initiative: Advantages and Disadvantages of Vaccine Types* CDC H1N1 Flu / 2009 H1N1 Nasal Spray Vaccine Q&A at the website of the US Centers for Disease Control and Prevention
" temperature)==References====External links==*Global Polio Eradication Initiative: Advantages and Disadvantages of Vaccine Types*CDC H1N1 Flu / 2009 H1N1 Nasal Spray Vaccine Q&A at the website of the US Centers for Disease Control and Prevention