Study purpose is to determine proportion of pregnant women who have no symptoms but are COVID-19 positive

The purpose of this research study is to understand if convalescent plasma is a potential therapy and to understand the immune response to COVID-19 infection. Understanding the immune system's response after infection will help to inform vaccine design and the potential role of antibodies as therapeutics in the setting of COVID-19 infection and disease.

The purpose of this study is to understand how the COVID-19 pandemic is affecting romantic relationships.

We are interested in studying how politics shapes and is shaped by responses to Covid-19 in Russia and Ukraine.

The goal of this study is to learn more about relationships, sexuality, family, work, and finances. This new information will help us understand factors that contribute to health among diverse adult populations including people who identify as straight or LGBT, as well as different races and ethnicities.

To better understand patients' knowledge and concerns specific to the covid pandemic

The purpose of Heroes Health is to support COVID-19 worker health.

The purpose of this online survey is to understand how COVID-19 may have impacted college students access to food. This research will help understand how the food situation of college students has been impacted by COVID-19 and can help determine resources needed to help improve student access to healthy food.

Our study seeks to understand how we perceive and are impacted by the current COVID-19 global health pandemic. We ask about how the pandemic has impacted our well-being, our daily life, and our political views. In all versions of our study participants fill out survey questions about these topics. As well, some participants are additionally asked to write about how the pandemic has impacted them, and/or, to read excerpts of news articles about the pandemic.

The virus that causes COVID-19 disease infects many people, but only some get sick. We want to understand how COVID affects the immune system and what makes severe COVID infections different from other diseases that cause hospitalization and breathing problems. We collect samples of blood, sputum, urine, and stool from patients in the hospital to learn how COVID affects cells and molecules of the immune system.