Chang Y, Brewer NT, Rinas AC, Schmitt K, Smith JS (July 2009). "Evaluating the impact of human papillomavirus vaccines". Vaccine27 (32): 4355–62. doi:10.1016/j.vaccine.2009.03.008. பப்மெட்:19515467.
Liesegang TJ (August 2009). "Varicella zoster virus vaccines: effective, but concerns linger". Can. J. Ophthalmol.44 (4): 379–84. doi:10.3129/i09-126. பப்மெட்:19606157.
Chang, Yuli; Brewer, Noel T.; Rinas, Allen C.; Schmitt, Karla; Smith, Jennifer S. (July 2009). "Evaluating the impact of human papillomavirus vaccines". Vaccine27 (32): 4355–62. doi:10.1016/j.vaccine.2009.03.008. பப்மெட்:19515467.
Liesegang, Thomas J. (August 2009). "Varicella zoster virus vaccines: effective, but concerns linger". Canadian Journal of Ophthalmology44 (4): 379–84. doi:10.3129/i09-126. பப்மெட்:19606157.
Liesegang, Thomas J. (August 2009). "Varicella zoster virus vaccines: effective, but concerns linger". Canadian Journal of Ophthalmology44 (4): 379–84. doi:10.3129/i09-126. பப்மெட்:19606157.
"Disease Eradication". The History of Vaccine. The College of Physicians of Philadelphia, BirthPlace of American Medicine. Last updated 25th January 2018. Retrieved 28 சனவரி 2018. {{cite web}}: Check date values in: |date= (help)
Chang Y, Brewer NT, Rinas AC, Schmitt K, Smith JS (July 2009). "Evaluating the impact of human papillomavirus vaccines". Vaccine27 (32): 4355–62. doi:10.1016/j.vaccine.2009.03.008. பப்மெட்:19515467.
Liesegang TJ (August 2009). "Varicella zoster virus vaccines: effective, but concerns linger". Can. J. Ophthalmol.44 (4): 379–84. doi:10.3129/i09-126. பப்மெட்:19606157.
Chang, Yuli; Brewer, Noel T.; Rinas, Allen C.; Schmitt, Karla; Smith, Jennifer S. (July 2009). "Evaluating the impact of human papillomavirus vaccines". Vaccine27 (32): 4355–62. doi:10.1016/j.vaccine.2009.03.008. பப்மெட்:19515467.
Liesegang, Thomas J. (August 2009). "Varicella zoster virus vaccines: effective, but concerns linger". Canadian Journal of Ophthalmology44 (4): 379–84. doi:10.3129/i09-126. பப்மெட்:19606157.
Liesegang, Thomas J. (August 2009). "Varicella zoster virus vaccines: effective, but concerns linger". Canadian Journal of Ophthalmology44 (4): 379–84. doi:10.3129/i09-126. பப்மெட்:19606157.