SINGAPORE - The idea of doing something for seniors most at risk of social isolation started during the circuit breaker when a group of six friends - equipped with social media, Netflix and their phones - got bored staying at home. Ms Jaslyn Muk, an undergraduate, said: "We thought why not encourage people to send letters to each other and spread good vibes to endure the tough period. "Social isolation among seniors has always been a concern in Singapore and with the Covid-19 pandemic, its impact is far worse." For example, visitors were barred from nursing homes from April to June after Covid-19 cases were found at a nursing home.