The U.S. recently saw its highest flu case count in 25 years, with a new, highly transmissible variant now circulating. Amazon is selling at nearly 24% off on its Big Spring Sale for five standard nasal swab kits from iHealth, an FDA-authorized over-the-counter brand. These rapid tests can help catch flu-like illness and assist in identifying and identifying cases. While the virus continues to mutate, these OTC tests still work at tracking positive cases. The four-step tests are easy to perform at home and accurate.