With at-home Covid-19 tests in high demand and their efficacy in question, health departments from California to Massachusetts are turning to sewage samples to get a better idea of how much the coronavirus is spreading through communities and what might be in store for health care systems.

Experts say wastewater holds the key to better understanding the public health of cities and neighborhoods, especially in underserved areas that do not have equal access to care.

The COVID antiviral drugs are here but they're scarce. Here's what to know

Two highly anticipated COVID-19 pills have been authorized for emergency use and allocated for shipment to states, but the supply is tight, and the rollout varies from state to state.

Pfizer's Paxlovid and Merck's molnupiravir are both oral antiviral pills that can be taken at home to keep patients out of the hospital. They're meant to be taken within the first few days of having COVID-19, and they reduce the risk of hospitalization and death by up to 88% for Paxlovid and 30% for molnupiravir.