Vivica Kraak, Virginia Tech (IMAGE) Virginia Tech Caption Vivica Kraak, an assistant professor of food and nutrition policy, found that international entities have fallen short on agreements to restrict marketing of unhealthy foods to children and teens. Credit Virginia Tech College of Agriculture and Life Sciences Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.