Objectives This study examines differences in the mental and physical health of the U.S. population during the early stages of the COVID-19 pandemic among three groups: non-caregivers, short-term caregivers (one year or less), and long-term caregivers (greater than one year). Methods Data from the Understanding America Study are used to describe group differences in reports of psychological distress and somatic symptoms. Logistic and negative binomial regression models are used to examine whether these differences persist after adjusting for demographic, socioeconomic, and pre-pandemic health conditions. To understand within-group differences in caregiving demands, the intensity of care provided by short-term and long-term caregivers, as well as selected patients’ health conditions are summarized. Results Adults’ mental and physical health varied substantially by caregiver status. Caregivers continued to fare worse than non-caregivers in terms of mental health and fatigue, and long-term caregivers were more likely to report headache, body aches, and abdominal discomfort than both short-term caregivers and non-caregivers, net of controls. The nature of caregiving differed between short-term and long-term caregivers, with the latter more likely to provide greater hours of care, and to be looking after patients with permanent medical conditions. Discussion Efforts to understand and mitigate the impact of the pandemic on population health should include caregivers, whose mental and physical health were already vulnerable before COVID-19.

Thick gallium nitride films 250–350 µm in thickness were grown on 2-inch-diameter (0001) sapphire wafers by hydride vapor phase epitaxy. The size of the free-standing GaN substrates without cracks separated from the sapphire substrates by laser processing was equal to that of the initial sapphire substrates. The origin of bowing and the broad photoluminescence (PL) spectra of GaN films was considered the difference in the residual strain between the front and bottom surfaces caused by threading dislocations.

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These findings are the first to show that both men and women are likely to provide transfers to two generations and that transfers to two generations are common across adult ages. Our findings suggest a need to rethink the notion of the sandwich generation, which has focused on women in late middle age, to include men and women across younger and older ages.