[3] On 19 February 2014, Nilsson and Ida Ingemarsdotter, won bronze medals together in the team sprint at the Olympic Games in Sochi.

On 2 March 2017, she won the silver medal in the 4 × 5 km relay (with Anna Haag, Charlotte Kalla, and Ebba Andersson) at the World Championships in Lahti.

[5] Nilsson started the season off successfully, but injured her thigh in an extreme finish line stretch at the Otepää sprint event.

She managed to recover just in time to return to competition at the 2019 World Championships in Seefeld, where she started her campaign with a silver medal in the freestyle sprint.

Nilsson's success continued for the rest of the season and included a distance win at the World Cup finals in Quebec.

She also took part in the European Championships in January, placing 42nd in the sprint and 38th in the pursuit; struggles with shooting were consistently present during Nilsson's debut season.

Nilsson's second season as a biathlete saw her secure a near-permanent spot at the starting line in World Cup competitions; she took part in almost all WC weekends.

In January 2022, she celebrated her first World Cup podium, a second place at the relay in Ruhpolding, where she got to ski a leg at the absence of Sweden's biggest biathlon stars.

[9] Due to the success of her more seasoned teammates, Nilsson did not get to start in any of the races, which prevented her from getting a first chance at winning an Olympic medal in both cross-country skiing and biathlon.