Now that all Americans over the age of 16 are eligible for a Covid-19 vaccine, the challenge becomes convincing enough people to roll up their sleeves to get the shot. On Wednesday, the country saw its highest daily rise in infections and deaths since the start of the pandemic – 295,041 new Covid-19 cases and 2,023 fatalities – as hospitals turn away patients and beg for more oxygen, while desperate families plead for beds and medicines on social media. “The volume is humongous,” said Jalil Parkar, a senior pulmonary consultant at the Lilavati Hospital in Mumbai, which has had to convert its lobby into an additional Covid ward. “It’s just like a tsunami.” Prime Minister Narendra Modi addressed the nation on Tuesday, acknowledging the country’s “very big battle” against Covid-19. He however appealed to states to “use a lockdown as their last option,” even as the capital New Delhi entered its first full day of a week-long lockdown, Jessie Yung and Vedika Sud report. On Monday, Delhi Chief Minister Arvind Kejriwal warned that failing to halt movement in the city could lead to “tragedy.” When India went into lockdown last March, the mass exodus of migrant workers from the cities became one of the most enduring images of the country’s battle against the virus – and is believed to have helped to spread Covid-19 nationwide. This month, thousands of people have been seen heading to railway stations and bus stops in cities such as Mumbai and Delhi, yet the central government has maintained that no reverse migration is taking place. The second wave, which has surpassed the first, was a situation created by complacency, say experts, pointing to the government relaxing measures, and a false sense of security from the public. Weeks before cases began climbing again, the federal health minister declared that India was “in the endgame” of the pandemic. Despite warnings of Covid risks, sports matches resumed, elaborate weddings were held and movie cinemas reopened. This month, one of the biggest pilgrimages on Earth, the Hindu festival the Kumbh Mela, went ahead. The Biden administration said it will deploy additional supplies and support to India in response to mounting pressure to help the Covid-19 stricken nation. India, which is second only to the United States in total case count, broke global records for the fifth straight day Monday with 352,991 new coronavirus infections. YOU ASKED. WE ANSWERED. Q. Can I celebrate Easter with my loved ones? A: It’s literally impossible to get Covid-19 from any of the vaccines used in the US because none of them contains even a piece of real coronavirus. Send your questions here. Are you a health care worker fighting Covid-19? Message us on WhatsApp about the challenges you’re facing: +1 347-322-0415. WHAT’S IMPORTANT TODAY It is unclear whether the world’s second most populous country, with nearly 1.4 billion people, has enough vaccines to meet this expanded demand. Currently, only healthcare workers, frontline workers or people 45 years and older are eligible to be vaccinated in India, and vaccine supplies have already dried up in some places, with at least five states reporting severe shortages. The European Medicines Agency (EMA) said Tuesday it had found a possible link between the Johnson & Johnson Covid-19 vaccine and rare blood clots, but stressed the overall benefits outweigh the risks. For use in the European Union, the agency said the vaccine must include a warning about “unusual blood clots with low blood platelets.” The underlying mechanism that may be involved in the blood clots linked to the Johnson & Johnson vaccine in the US and AstraZeneca’s vaccine in Europe is extremely rare and appears to involve a little-understood immune response. Experts say taking the vaccines far outweighs the risks. Blood clots in general are relatively common – affecting 900,000 Americans a year, according to the Centers for Disease Control and Prevention (CDC). And being infected with coronavirus greatly raises this risk. Angela Merkel is racing against the clock to defeat the coronavirus before stepping down in September. She has a lot going against her. Germany is struggling to contain the latest wave of the pandemic and an influential medical association has warned that most of the country’s intensive care units are running at or close to full capacity. The number of Germans lost to the virus surpassed 80,000 yesterday. Covid-19 vaccinations in the United States are continuing at an impressive pace, and now all Americans aged 16 and up can get a shot. But health officials warn that the country remains in a “complicated stage” of the pandemic. In the past seven days, the US reported an average of more than 67,100 new Covid-19 infections daily, according to Johns Hopkins University data. That’s slightly below the previous week’s figure, but it’s still 25% above what it was nearly a month ago. There are several reasons for this rise, say experts, namely dangerous coronavirus variants – such as the more contagious B.1.1.7 strain that has helped fuel another surge in Michigan. Pandemic fatigue and more Americans moving around are also not helping. Many don’t have ID cards or health insurance; others live in Colombia without the proper documentation or work informally. Several Venezuelan migrants told CNN that the precariousness of their existence is a factor in concern about the Covid-19 vaccine. But it’s not the only one. As much as China may want to promote its domestically produced Covid-19 vaccines, it also has to face reality. Beijing issued a policy last month making it easier for foreigners to apply for a visa to China if they had received a Chinese vaccine. Experts warn it sets a dangerous precedent that could leave the world separated into vaccine silos. Americans will be able to travel to Europe in summer, but some are missing second vaccines ON OUR RADAR TODAY’S PODCAST CNN’s Chief Medical Correspondent Dr. Sanjay Gupta speaks with Hannan, executive director of the Association of Immunization Managers, about how the United States turned its vaccine rollout around. Listen now. “Masks work and testing works. Contact tracing works. We have 507 people here and we were able to manage it, just doing that: testing, isolation and contact tracing.” — Filmmaker and actor Tyler Perry.