More cells participate in this response than the in the primary response. The secondary response is more rapid and produces a greater amount of antibody. Moreover, the antibody concentration remains high for a much longer period. The main antibody produced during the secondary response is IgG. The secondary response is due to the activity of the B-lymphocytes (memory cells) stimulated during the primary response.
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South Carolina's fourth area code will be 854. The area code will be used throughout the Lowcountry and Pee Dee areas, wherever the 843 area code is currently in use. Ã. Ã. South Carolina's fourth area code will be 854, but no one is expected to get one of the new phone numbers until some time in 2015.The 854 number will be South Carolina's first overlay area code, so it's expected to cause some confusion.It will become a second area code for the areas currently served by 843 so the 854 area code numbers will be assigned as the available 843 numbers run out.. South Carolina's fourth area code will be 854, but no one is expected to get one of the new phone numbers until some time in 2015. The 854 number will be South Carolina's first overlay area code, so it's expected to cause some confusion.