def parse_csv_data(csv_filename: str) -> list[str]:
    """ Fetch covid data from CSV.

    Args:
        csv_filename: Name of the CSV file to fetch data from

    Returns:
        list_of_lines: Data from CSV in a list, each str element being a new line of csv.
    """
    list_of_lines = []
    with open(csv_filename, 'r', encoding="UTF-8") as file:
        # open the file specified by parameter "csv_filename" using read
        for line in file: # loop through file
            list_of_lines.append(line) # append data to list "list_of_lines"
    return list_of_lines