Fareha Ahmed had been cautious since the beginning of the pandemic. She had eaten in restaurants only three times. She and her husband were vaccinated and boosted, and their 7-year-old got vaccinated in November as soon as he was eligible. In mid-December, Ahmed, 39, who lives in Brightwood Park in the District, met a former colleague for an outdoor lunch. A few days later, the family attended an indoor gathering for the first time with other families, to bake Christmas cookies.