Polyrizon Ltd., a biotech company, engages in the development of medical device hydrogels in the form of nasal sprays in Israel. The company's nasal sprays provide a barrier against viruses and allergens from contacting the nasal epithelial tissue. It develops PL-14, a nasal allergies blocker; PL-15 for COVID-19; and PL-16 for influenza. The company was incorporated in 2005 is headquartered in Ra'anana, Israel.