Protect yourself with the flu jab

Viwe Ndongeni-Ntleb

South African experts share reasons why getting the flu shot is worth it, including how dangerous it would be to have the flu and Covid-19 at the same time.

BECAUSE of the Covid-19 pandemic, reducing the spread of respiratory illnesses, like flu, this winter is more important than ever.

In the past year, flu was delayed and not widely spread, thanks in large part to social distancing measures aimed at reducing the coronavirus’ spread.

But experts say there could be a downside: Scientists may struggle to predict what flu strains will dominate this season – making it challenging to create effective vaccines.

This year the Institute For Communicable Diseases has already officially detected one case of influenza in the Western Cape, making this time a crucial one to protect against this flu.

South African experts have cited a list of reasons why getting the flu shot is worth it, including how dangerous it would be to have the flu and Covid-19 at the same time.

SOUTH Africa experiences seasonal influenza epidemics every winter. | PAVEL DANILYUK Pexels

Dr Morgan Mkhatshwa, Head of Operations at Bonitas Medical Fund answers all questions on what to expect with this year’s flu season. When will this year’s flu viruses circulate?

South Africa experiences seasonal influenza epidemics every winter. Although the timing of the influenza season varies from year to year, it is usually during the winter months (May to August) but may start as early as April and as late as July. For the past 13 years, the average duration of the influenza season has been 19 weeks. This could be affected if we go into a third Covid-19 wave and another lockdown where the spread of all viruses, including flu, slowed down. It should be noted that prevention of severe influenza during pandemics, such as Covid- 19, can reduce the burden on the healthcare system.

When will flu season peak in 2021 and how will it affect people?

It is uncertain as this will be influenced by the possibility of a third wave of Covid-19 and stricter lockdowns. When we are in lockdown, the flu virus, like Covid, does not spread as rapidly.

What kind of vaccines are available in South Africa? What flu viruses does this season’s vaccine protection?

For the 2021 influenza season an inactivated quadrivalent influenza vaccine (QIV), containing an additional lineage of influenza B, will be available in South Africa

What flu virus strain do we have in 2021?

There are three types of seasonal influenza viruses – namely type A, B and C. In South Africa, seasonal flu is most commonly caused by type A or type B influenza viruses.

Influenza is a viral respiratory illness that is most prevalent during autumn and winter months. It is a highly communicable disease which is associated with severe morbidity and mortality.

Locally, severe illness caused by influenza affects more than 45 000 people annually, with almost 50% of them require hospitalisation. It is also estimated that 11 800 people lose their lives every year, in South Africa, from flu-related illness. While it can be potentially lifethreatening in certain individuals, it is a vaccine-preventable illness.

All procured influenza vaccines in South Africa in 2021 are quadrivalent (designed to protect against four different flu viruses), two influenza A and two influenza B strains.

What should I do to protect myself from flu this season?

Get vaccinated. Flu vaccines have been shown to reduce the risk of influenza illness, hospitalisation and death. Not only will flu vaccination reduce the risk of getting flu but is an important conservation measure for scarce health care resources which remains a concern with the ongoing the Covid-19 pandemic. The flu vaccine should be given sufficiently early to provide protection for the coming winter. A protective antibody response takes about two weeks to develop. As there is limited evidence of the safety and effectiveness of receiving these vaccines simultaneously, Mkhatshwa recommends waiting at least 14 days between having the Covid-19 and flu Vaccinations. Who is most at risk? The Department of Health, together with the National Institute for Communicable Diseases, targeted the following groups for the 2021 campaign:

◆ Healthcare workers

◆ Individuals 65 years and above

◆ People with comorbidities like heart disease, diabetes or lung disease

◆ Pregnant women

◆ People living with HIV and Aids

Still not convinced of the importance of flu?

Flu viruses spread very quickly from person to person. Even if the flu vaccine is not 100% effective against the current flu strain it will reduce your chances of getting flu and, if you do get it, it will be a great deal milder.

More importantly, by having the flu vaccine you will protect others, via what is called’herd immunity’. Others may be vulnerable family members such as small babies and the elderly as well as those who are immune compromised.

Social distancing, wearing a mask, hand washing and sanitisation can help protect you from both Covid-19 and flu.

FLU vaccines have been shown to reduce the risk of influenza illness, hospitalisation and death. | CDC Unsplash