Covid 19 ogun discharges 40 quarantined contacts

I think there may be a slight mistake in your message. Ogun is a state in Nigeria, not a medical facility or a country that can discharge patients. Additionally, COVID-19 is a global pandemic that has affected many countries, including Nigeria.

However, I'm assuming you meant to say that Ogun State in Nigeria has discharged 40 quarantined contacts who had been in close contact with COVID-19 patients.

Here's a possible rephrased version of your message:

"Ogun State in Nigeria has discharged 40 quarantined contacts who had been in close contact with COVID-19 patients, following a successful quarantine period and negative test results."