Are there any data on masks to prevent RSV? Even for Covid the data is pretty patchy, and anecdotally they don't seem to be highly effective, at least in actual

Are there any data on masks to prevent RSV? Even for Covid the data is pretty patchy, and anecdotally they don't seem to be highly effective, at least in actual use. Countries where mask usage has gone from very high to low in a short space of time have seen virtually no change to infection rates.