One of the most important things that you have to understand about the Covid virus is that it keeps mutating, as long as it gets a chance to, in fact, as many people as it can. It starts becoming a problem, because the vaccines that have been developed start losing their efficacy rate, as long as the virus keeps on mutating. The vaccines that were developed have been proven to be very effective against the variants that were spreading in the year 2020.
2021 has actually proven to be quite gruesome, because the virus has mutated multiple times, especially in countries like the United States of America and India, where there are millions of cases of Covid, and it looks like there is no way to stop the spread, even though there are significant numbers of lockdowns in India and the United Kingdom. If we are talking about countries like Australia, they have closed their international borders for a really long time. But, the virus continues to spread, and it continues to be found in countries that have been in lockdown and countries that have even closed their borders.
The Delta variant has actually been reading around the world at a scorching rate, and this is a statement that was told by a person who holds a significant post in the WHO. This variant of the virus is actually something that we have to be very careful of. A lot of officials in the United States are saying that fully vaccinated individuals do not need a booster shot, but we have no idea how the Delta variant is going to start affecting people who have already been vaccinated. If you have had Covid a before, you may have a certain amount of protection against the Delta variant, because your body has natural immunity. This means that if you have already been infected with Covid, your body will already know how to fight the virus in a natural manner. This means, your body has antibodies against this particular virus. It may not be against a particular kind of strand of virus, but it depends on the mutation. Even though you have had Covid before and even if you have been vaccinated, it is recommended that you follow Covid regulations, and you should wear a mask, especially if you are in a place that has a lot of people around you.
In places like the United Kingdom, the Prime Minister, Boris Johnson, has also stated that even though lockdown restrictions are being lifted on July 19, people should follow Covid appropriate behaviour. The country has actually been in a lockdown for a really long time, and they are finally lifting restrictions.