Biotech Values

[iwfal]

the risk of allergy is likely extremely low

Yes - the first time you use it. But it does seem to induce problems with repeated use:

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=Abstract&list_...

I would expect that as Bovine Thrombin continues to grow its market the problems will become worse.