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import pandas as pd

meta = pd.read_csv('/kaggle/input/CORD-19-research-challenge/metadata.csv')

meta_dropped = meta.drop(['Microsoft Academic Paper ID', 'WHO #Covidence'], axis=1)

miss = meta['abstract'].isna().sum()
print('The number of papers without abstracts is {:0.0f} which represents {:.2f}% of the total number of papers'.format(miss, 100 * (miss / meta.shape[0])))