Director-General Tedros Adhanom Ghebreyesus warned that countries should not reopen economies if they don't have control over the virus.
He advocated a focus on reducing deaths by protecting the elderly, people with underlying conditions and essential workers.
Dr. Tedros also urged individuals to wear face masks, observe social distancing and frequently wash their hands. That's what World Health Organization wants too.
"Widespread stay-at-home orders can be avoided if countries take temporary and geographically-targeted interventions", Dr Tedros said.
"Countries that do this well may be able to cope with low levels of transmission as they open up".
Dr. Mike Ryan, the agency's director of the Health Emergencies Program, said any country's vaccine policy "must be guided by the highest possible ethical standard".
The fourth factor in safely easing restrictions is for governments to have a clear plan of action on how to find, isolate, test and care for COVID-19 cases, while also quickly tracing and quarantining close contacts.
To be sure, all countries are under extreme pressure, he declared.
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Adib was confirmed with 90 of 128 votes in parliament on Sunday. "The government should be formed very quickly", he added. The close aide to former prime minister Najib Mikati received backing from the country's top political parties.
The COVID-19 pandemic also disrupted life-saving emergency services in almost a quarter of the countries included in the survey.
The US accounted for the world's highest number of cases and deaths at 6,028,617 and 183,579 respectively, while Brazil came in the second with 3,908,272 infections and 121,381 fatalities. A WHO survey on the impact of COVID-19 on health systems in 105 countries found that 90 per cent of those surveyed have experienced disruption to their health services, with low- and middle-income countries reporting the greatest difficulties.
Tedros said the survey, covering five regions between March and June, exposed the need for better preparation for health emergencies like the current pandemic.
"The survey shows that up to 70 percent of services have been disrupted for essential services including routine immunization, diagnosis and treatment for non-communicable diseases, family planning and contraception, treatment for mental health disorders and cancer diagnosis and treatment", Tedros said.
To sustain these efforts, Tedros said World Health Organization had launched a $76 million appeal.
He also added that "COVID-19 should be a lesson to all countries that health is not an "either-or" equation".
"If we were to open up with numbers anything like what we have had, even with a really positive trend, then those numbers will explode", Mr Andrews said. "When we are united, we can defeat it".