I didn't knew there is a liquid form of ivermectin, cannot say nothing about it. Ivermectin has many mechanisms of action that could maybe help against many different viruses. But the main mechanism is to block importer molecules. A virus tries to interfere with the self defence mechanism of the infected cell. The self defence needs proteins, the production of proteins needs RNA as blueprints and this RNA is created in the nucleus of the cell. The nucleus is protected and only importer molecules can bring stuff into the nucleus. Viruses use importer molecules to insert stuff into the nucleus that inhibits the creation of the RNA for the self defence. So if you want to know which viruses can be stopped by ivermectin, search for studies about the importer molecules, the so called importin or "importin α/β1 heterodimer". This is one I have found, talking about dengue, flavivirus, west nile, and zika virus: https://pubmed.ncbi.nlm.nih.gov/32135219/ This is only the short version, the long version costs money. In these cases you can use sci-hub.se. In https://sci-hub.se, you can enter the DOI number you find on the short version (in this case 10.1016/j.antiviral.2020.104760), this is the result: https://sci-hub.se/10.1016/j.antiviral.2020.104760