Why does WHO consider air pollution a public health emergency? If you live in highly polluted areas does COVID-19 affect you differently? WHO's Dr Maria Neira explains in science 5.

Are you aware of the medical waste generated during the pandemic? How does it impact your health and what can you do to reduce it? WHO's Dr Margaret Montgomery explains in Science in 5.

If Omicron is less severe, why are people ending up in the hospital and dying from it? Is it true that everyone will eventually get Omicron? Why is it important to reduce transmission? WHO's Dr Maria Van Kerkhove explains in Science in 5.

What do we know about Omicron variant so far? WHO's Dr Maria Van Kerkhove updates on the transmissibility, severity, symptoms and ways to protect yourself in Science in 5.

How has the pandemic impacted the fight against Polio? How has the polio infrastructure helped the fight against COVID-19? Why is it important that the world doesn't take its eyes off polio? Sona Bari explains in Science in 5 this week.

What have we learned about COVID-19 and antibiotics so far? What happens when antibiotics are not taken according to prescription or are used irrationally? When are antibiotics prescribed in the course of COVID-19 treatment? Dr Hanan Balkhy explains in Science in 5 this week.

How big a public health problem is lead poisoning? What are the sources of lead poisoning and who are at risk? What can you do to protect yourself? WHO's Lesley Onyon explains in Science in 5 this week.

How would you know if you have the flu or COVID-19? Should you take both flu vaccine and the COVID-19 vaccine if these are available to you? How does WHO decide on the composition of the flu vaccine? Dr Sylvie Briand explains in Science in 5 this week.

If you have Tuberculosis, what is your risk from COVID-19? How can you keep yourself safe during the pandemic? Why is it important that the world does not take its eyes off TB during the Pandemic? Dr Tereza Kasaeva explains in Science in 5 this week.

Learn about the first Malaria vaccine. Who should receive this vaccine? What are the challenges of rolling out a Malaria vaccine in the midst of a pandemic? Dr Pedro Alonso explains in Science in 5 this week.