RAND's American Life Panel (ALP) is a US nationally representative, probability-based panel of 6,000 participants ages 18 and older who speak English or Spanish and who are regularly interviewed over the internet. There are multiples sets of past and current ALP surveys on Influenza, COVID-19 and other subjects that can be drawn. These past datasets are mergeable via unique respondent IDs. The datasets are available after registration (Registration for approved researchers is free).