While the rise in short interest for Altimmune indicates a bearish outlook from traders, the short-term impact on the stock price is uncertain. High short interest can lead to increased volatility, especially if there is a short squeeze or if market sentiment shifts. The relevance is high as the article focuses on Altimmune's short interest, but the importance is moderate because short interest is just one of many factors that can affect stock price. The confidence level is not at the maximum because market reactions can be unpredictable.