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Early detection and ongoing monitoring of infectious diseases depends on diagnostic testing. The US has a large, diverse system of public, academic, and private laboratories that develop new diagnostic tests; perform routine testing; and conduct specialized reference testing, such as genomic sequencing. These laboratories operate under a complex mix of laws and regulations at the federal, state, and local levels. The COVID-19 pandemic exposed major weaknesses in the nation's laboratory system, some of which were seen again during the global mpox outbreak in 2022. In this article we review how the US laboratory system has been designed to detect and monitor emerging infections, describe what gaps were revealed during COVID-19, and propose specific steps that policy makers can take both to strengthen the current system and to prepare the US for the next pandemic.

Fear is now commonly used in public health campaigns, yet for years ethical and efficacy-centered concerns provided a challenge to using fear in such efforts. From the 1950s through the 1970s, the field of public health believed that using fear to influence individual behavior would virtually always backfire. Yet faced with the limited effectiveness of informational approaches to cessation, antitobacco campaigns featured fear in the 1960s. These provoked little protest outside the tobacco industry. At the outset of the AIDS epidemic, fear was also employed. However, activists denounced these messages as stigmatizing, halting use of fear for HIV/AIDS until the 21st century. Opposition began to fracture with growing concerns about complacency and the risks of HIV transmission, particularly among gay men. With AIDS, fear overcame opposition only when it was framed as fair warning with the potential to correct misperceptions.

The clinical consequences of HCV infection are increasing because the population with the highest prevalence of the infection, persons born between 1945 and 1965, is aging. As a result, health care expenditures are expected to increase. Now that a cure for HCV infection is the norm, a public health approach is necessary to identify, link to care, and treat infected persons and prevent new infections. We believe that the success of public health interventions, such as those for tuberculosis, can be translated to HCV infection. New York City has many HCV-infected residents and has developed a public health approach to controlling the HCV epidemic. It encompasses surveillance and monitoring, case finding, linkage to care, care coordination, increasing clinical provider capacity for screening and treatment, increasing public awareness, and primary prevention.

For nearly a decade, interest groups, from politicians to economists to physicians, have touted digitization of the nation's health information. One frequently mentioned benefit is the transmission of information electronically from laboratories to public health personnel, allowing them to rapidly analyze and act on these data. Switching from paper to electronic laboratory reports (ELRs) was thought to solve many public health surveillance issues, including workload, accuracy, and timeliness. However, barriers remain for both laboratories and public health agencies to realize the full benefits of ELRs. The New York City experience highlights several successes and challenges of electronic reporting and is supported by peer-reviewed literature. Lessons learned from ELR systems will benefit efforts to standardize electronic medical records reporting to health departments.