Reuters: US STOCKS-Wall St up on factory activity data, health care rally
* US Oct factory activity slows less than expected * Visa drops after offer to buy Visa Europe, top drag on Dow * Dyax soars after Shire offers to buy company * Indexes up: Dow 0.55 pct, S&P 0.70 pct, Nasdaq 0.96 pct (Updates to early afternoon) By Abhiram Nandakumar Nov 2 (Reuters) – Wall…