Table 2.

Summary for text classification based papers

S. no.	Year	Author and Paper	Important discussed topic	Model/technique
1	2021	Madichetty and Sridevi [27]	Detecting situational tweets in the aftermath of a disaster.	Feature-based approach and Fine-tuned RoBERTa model.
2	2021	Malla and Alphonse [28]	Detection of useful information tweets about COVID-19	Majority voting technique, RoBERTa, BERTweet, and CT-BERT
3	2020	Jagadeesh and Alphonse [1]	Identify and classify informative COVID-19 tweets	RoBERTa
4	2007	Danesh et al. [29]	An ensemble ML model for text classification.	Naive-Bayes, k-NN classifier and Racchio with fusion method
5	2021	Kranthi Kumar and Alphonse [30]	Impact of respiratory sounds on COVID-19 disease identification	CNN