A well 6-month-old infant with coronavirus disease 2019 (COVID-19) had persistently positive nasopharyngeal swabs up to day 16 of admission. This case highlights the difficulties in establishing the true incidence of COVID-19, as asymptomatic individuals can excrete the virus. These patients may play important roles in human-to-human transmission in the community.

A new type of lightly crosslinked shape‐memory polymer that contains reversibly associating side‐groups is reported. H‐bonding interactions stabilize mechanically strained states at low temperatures. The materials' shape recovery rate exhibits Arrhenius‐like temperature dependence due to the dynamics of H‐bond dissociation.

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