The United States is experiencing a fresh wave of COVID-19 infections.

Experts are concerned that current surveillance systems may underestimate the true extent of the problem.

[{"selector":"#anim-1c2c9cef-ac86-4138-8ff9-99b82ff5b253","keyframes":{"transform":["translate3d(105.37085%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(.2, 0, .8, 1)","fill":"both"}] [{"selector":"#anim-abdf256e-97c9-4e59-be34-f6362b357d2a","keyframes":{"transform":["rotateZ(180deg)","rotateZ(0deg)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(.2, 0, .5, 1)","fill":"forwards"}] [{"selector":"#anim-ec5120a0-a259-4769-adb4-5e75861160c3","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-1c0e4764-e236-42a6-beaf-e464602d5f48","keyframes":{"transform":["translate3d(100.00000%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}]

Anecdotal evidence suggests widespread transmission despite lower official statistics.

[{"selector":"#anim-097e88fe-9855-407d-9f56-4fd80ba4f59b","keyframes":{"transform":["rotate(-540deg) scale(0.1)","none"],"opacity":[0,1]},"delay":0,"duration":1000,"fill":"both","iterations":1}] [{"selector":"#anim-bdba0de8-9f52-43a9-98c2-2c041bcf4803","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}]

Health officials and epidemiologists emphasize the need for vigilance.

[{"selector":"#anim-47f16177-2fa7-4a63-92a5-5c9861ce324d","keyframes":{"transform":["translate3d(108.24177%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(.2, 0, .8, 1)","fill":"both"}] [{"selector":"#anim-f6dd6059-2d2b-4f53-afd7-ae3f18a9ecde","keyframes":{"transform":["rotateZ(180deg)","rotateZ(0deg)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(.2, 0, .5, 1)","fill":"forwards"}] [{"selector":"#anim-48c41664-47dc-4b7c-814f-d4e9ade6f5d8","keyframes":{"transform":["rotate(-360deg) translate3d(100.23697%, 0px, 0) rotate(360deg)","rotate(-360deg) translate3d(0px, 0px, 0) rotate(360deg)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(.2, 0, .8, 1)","fill":"both"}] [{"selector":"#anim-ba967105-f994-4aa0-8601-6858eefc7061","keyframes":{"transform":["rotate(-360deg) rotateZ(180deg) rotate(360deg)","rotate(-360deg) rotateZ(0deg) rotate(360deg)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(.2, 0, .5, 1)","fill":"forwards"}]

Weekly hospital admissions have nearly doubled in the past month.

[{"selector":"#anim-53d7fb7a-fc03-4156-b5ea-2bbe921b2905","keyframes":{"transform":["translate3d(114.20119%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(.2, 0, .8, 1)","fill":"both"}] [{"selector":"#anim-fe107b17-10e2-4d35-bf60-9f45c10b37c4","keyframes":{"transform":["rotateZ(180deg)","rotateZ(0deg)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(.2, 0, .5, 1)","fill":"forwards"}] [{"selector":"#anim-d5a291dd-f180-4ccc-9898-916dda961439","keyframes":{"transform":["translate3d(99.28058%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-5456ffcc-a3ae-470a-b02c-d13acf104913","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-01081756-6892-4465-aa51-408f7ffaf187","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}]

Hospitals have adjusted testing practices, making data comparisons challenging.

[{"selector":"#anim-d45b2214-7353-4e1d-9e34-86177f002860","keyframes":{"transform":["rotate(-540deg) scale(0.1)","none"],"opacity":[0,1]},"delay":0,"duration":1000,"fill":"both","iterations":1}] [{"selector":"#anim-a7f8081b-8c33-400b-bbc1-7356aeac2f76","keyframes":{"transform":["translate3d(100.00000%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-16063e4d-9d12-4858-85eb-4b9333a2450e","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0f98db63-6bca-49e0-a8c4-7d0bc66071b7","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}]

Mask mandates have been reinstated in schools, hospitals, and communities.

[{"selector":"#anim-32f9c0bf-77e4-417b-98e6-1a47230e4c78","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0764f3e9-4f32-4044-a6c2-a4de9d623252","keyframes":{"transform":["translate3d(101.71149%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-077ba1f9-d4d3-410c-b4ba-ecee2d76d8f9","keyframes":[{"offset":0,"transform":"translate3d(0, -143.5633%, 0)","easing":"cubic-bezier(.5, 0, 1, 1)"},{"offset":0.29,"transform":"translate3d(0, 0%, 0)","easing":"cubic-bezier(0, 0, .5, 1)"},{"offset":0.45,"transform":"translate3d(0, -40.36999996%, 0)","easing":"cubic-bezier(.5, 0, 1, 1)"},{"offset":0.61,"transform":"translate3d(0, 0%, 0)","easing":"cubic-bezier(0, 0, .5, 1)"},{"offset":0.71,"transform":"translate3d(0, -13.72465148%, 0)","easing":"cubic-bezier(.5, 0, 1, 1)"},{"offset":0.8,"transform":"translate3d(0, 0%, 0)","easing":"cubic-bezier(0, 0, .5, 1)"},{"offset":0.85,"transform":"translate3d(0, -5.15392247%, 0)","easing":"cubic-bezier(.5, 0, 1, 1)"},{"offset":0.92,"transform":"translate3d(0, 0%, 0)","easing":"cubic-bezier(0, 0, .5, 1)"},{"offset":0.96,"transform":"translate3d(0, -2.23958748%, 0)","easing":"cubic-bezier(.5, 0, 1, 1)"},{"offset":1,"transform":"translate3d(0, 0%, 0)","easing":"cubic-bezier(0, 0, .5, 1)"}],"delay":0,"duration":600,"fill":"both"}]

Unvaccinated individuals and those with underlying health conditions are at higher risk.

[{"selector":"#anim-930f8d13-c5c5-48d3-a874-de924f1a505d","keyframes":{"transform":["translate3d(104.12371%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(.2, 0, .8, 1)","fill":"both"}] [{"selector":"#anim-01578c79-5d84-4bc3-8d85-2aa0830eb151","keyframes":{"transform":["rotateZ(180deg)","rotateZ(0deg)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(.2, 0, .5, 1)","fill":"forwards"}] [{"selector":"#anim-2fb47014-7221-4952-8c88-0c94792485ae","keyframes":{"opacity":[1,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-210814df-04cc-4b4b-8b8e-00896918ddce","keyframes":{"transform":["scale(3)","scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

Emerging variants, EG.6 (Eris) and BA.2.86 (Pirola), are being monitored, with EG.5 (Eris) labeled as a "variant of interest" by the World Health Organization.

[{"selector":"#anim-8b448fb3-67e1-4440-b39f-51d9103d8cce","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-7956553a-5657-404e-9e2e-e18b99b56c2e","keyframes":{"transform":["translate3d(104.21052%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-6fbb7f27-771a-405f-baf2-c7a224c02945","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-4fbcfdeb-8fab-41fe-a5a7-8f5e2939bc67","keyframes":{"transform":["translate3d(0px, 100.04249%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}]