https://www.vetsurgeon.org/f/clinical-questions/28372/do-dogs-develop-natural-resistance-to-lungwom When Lungworm was first being discussed many moons ago, a CPD evening I attended indicated that young dogs and &#39;naive&#39; unexposed dogs were most at risk. This implied to me that dogs that had had exposure to Angiostrongylus Vasorum developed some formen-USTelligent Community 10https://www.vetsurgeon.org/thread/213560?ContentTypeID=1Sun, 14 Jul 2019 06:52:32 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:8a3faaea-d15c-4658-8da1-a4131c16a0b0Andrea Tarr<p>I&#39;ve tried to find out and it appears that there is no research on it. Likewise there is no published evidence to help us know if less frequent than monthly dosing is effective prophylaxis for lungworm (Angiostrongylus). Who will fund this research? It is not in the interest of the pharmaceutical industry given that most of the money in veterinary medicines comes from parasiticides.&nbsp;</p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/213473?ContentTypeID=1Fri, 12 Jul 2019 01:07:39 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:4f626b2e-61fc-47c7-861c-9a010f7eef42Michael Woodhouse<p>It&#39;s an interesting question. Remember we have a cattle lungworm vaccine that is very effective. Course of two vaccines protects for life and costs the practice less than &pound;10 - or similar to 2 months of Advocate treatment.....................</p> <p>Not economical for the drug companies, I strongly suspect.</p><div style="clear:both;"></div>