There are a variety of speech-related symptoms that can be associated with apraxia, including: Difficulty stringing syllables together in the appropriate order to make words, or inability to do so. Minimal babbling during infancy. Difficulty saying long or complex words.
1 Understand that hepatitis B vaccination-induced protective antibodies can last for up to 15 years, but appear to fall off over time.
1 Patients who were vaccinated 10 to 15 years ago, especially those who were vaccinated as children, may not be adequately protected. 2  For patients with this history who are at moderate to high risk of hepatitis B infection consider quantitative hepatitis B antibody measurement to determine protective immunity.he authors concluded that hepatitis B vaccination protects strongly against infection for at least 15 years. One limitation of the study was that only slightly more than half of the original cohort had the 15-year follow-up testing.