A person who has tested positive (usually for an infectious disease such as a virus).
病院は新たに陽性者を受け入れる準備を始めた。
The hospital began preparing to accept new positive cases.
保健所は陽性者と濃厚接触のあった人を追跡している。
The health center is tracing people who had close contact with positive cases.
陽性者は一定期間、自宅や指定施設で隔離されることが多い。
Positive individuals are often isolated at home or in designated facilities for a certain period.