Atossa Therapeutics (NASDAQ:ATOS – Free Report) was upgraded by stock analysts at StockNews.com from a “sell” rating to a “hold” rating in a research report issued to clients and investors on Thursday. Atossa Therapeutics Trading Down 1.6 % ATOS opened at $1.26 on Thursday. Atossa Therapeutics has a 12-month low of $0.50 and a 12-month […]