Sentiment Analysis Covid-19 Vaccination on Twitter Social Media Using Naïve Bayes Method: Analisis Sentimen Masyarakat Terhadap Tindakan Vaksinasi Covid-19 Pada Media Sosial Twitter Menggunakan Metode Naïve Bayes. (2021). Procedia of Engineering and Life Science, 2. https://doi.org/10.21070/pels.v2i0.1144