Remove duplicate counting for numvac, numplac; add ID to vaccine; update arg name in seq parsing function
Remove duplicate counting for numvac, numplac; add ID to vaccine; update arg name in seq parsing function

gclenaghan/SIEVE,gclenaghan/SIEVE,nkullman/SIEVE,nkullman/SIEVE,gclenaghan/SIEVE,gclenaghan/SIEVE