How to use the covid.Covid function in covid

async def covid19(event: NewMessage.Event) -> None:
    """
    Get the current COVID-19 stats for a specific country or overall.


    `{prefix}covid` or `{prefix}covid USA India` or `{prefix}covid countries`
    """
    covid = Covid(source="worldometers")
    match = event.matches[0].group(1)
    if match:
        strings = []
        failed = []
        args, _ = await client.parse_arguments(match)
        if match.lower() == "countries":
            strings = sorted(covid.list_countries())
        else:
            for c in args:
                try:
                    country = covid.get_status_by_country_name(c)
                    string = f"**COVID-19** __({country['country']})__\n"
                    string += covid_str % country
                    if country['critical']:
                        string += critical_str % country
                    strings.append(string)